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Privacy Policy

Trenchless Technology Ltd. Privacy Statement

Revised and Effective as of 25th May 2018


At Trenchless Technology Ltd.* we take the confidentiality of our customer’s personal data very seriously. In accordance with the GDPR changes which are coming into place on 25th May 2018, we have made some amendments to our privacy policy and have detailed below how we collect, store and make use of the personal data we collect in order to provide our services to you. You do not need to do anything as a result of these updates. Fundamentally we only collect your information in order to provide you with the best quality Leak Detection service, in order to communicate with you throughout the process and in order to take payment for services provided. We never sell, or pass your information on to third parties. Nor do not use your data to contact you with unsolicited marketing campaigns. Please see below for further details.


Personal Information we collect to provide our Services

Information about our services can be obtained anonymously. However, in order for us to provide an accurate quotation for a Leak Detection, we require our prospective customers to share certain personal data with us from the list below. In order to book a Leak Detection appointment we usually require our customers to share all of the following information with us from the list below.


  • Customer’s name including title, first name and last name or company name
  • Site address where the Leak Detection is due to take place
  • Billing/postal address where payment details are registered for correspondence
  • Contact telephone number (landline, office, mobile)
  • Email address
  • Name and telephone number of on-site contacts
  • Credit/debit card number (long number on the front of the card)
  • Credit/debit card expiry date
  • Credit/debit card CVVC code


How do we obtain this Information?

In most cases, information is obtained directly from the customer, i.e. the individual or business paying for our services. We usually obtain all the information listed over the telephone, although names, telephone numbers and email addresses are sometimes provided via email. We also collect information when you fill out an enquiry form on one of our websites.


In some cases, our services are booked by an individual or a company on behalf of another individual or company, for example, an appointment booked by a Letting Agent on behalf of a Landlord. In these cases all information, except the payment details are usually obtained via the representative who makes the initial inquiry about our services and books the appointment. We prefer to obtain payment details directly from the individual/company making the payment. In cases where payment details are provided on behalf of the payee, we reserve the right to assume that the payee has given authorisation for payment details to be provided and for payment to be taken accordingly.


What do we use this information for?


We may use the data which we collect in some or all of the following ways:

  • To provide our services
  • To provide our customers with a report of the works and VAT invoice
  • To communicate with our customers and other onsite, office based or remote contacts
  • To improve customer service, respond to customer requests and support customer needs
  • To identify sites where we have previously carried out work
  • To identify existing customers
  • To collect payment for our services


How do we store & protect this Information?

Information is accessible only through our company’s database, which is password protected and stored on our secure server. Personal data is never printed, except when we are asked to send reports and invoices to customers through the post.


For how long do we keep your information?

We only store your data for as long as necessary to perform our services. Due to the nature of the service we provide, if leak detection works have been carried out at a site previously we need to be able to cross reference works already carried out. Therefore customer names, addresses and their corresponding reports may be kept on file for a number of years unless requested to be deleted by a customer.


How do we share your information?

We do not sell/trade or otherwise transfer your information to any third parties.

At no point during or after the provision of our services do we contact you for marketing purposes.

We do not share your information with any third parties. Exceptions to this include:

  • With your permission, we may share your information with other tradespeople who we feel will be able to help you resolve issues relating to your leak. For example, a company who can assist with remedial works.
  • At the request of your insurance provider we may provide more detail about cost breakdown and/or details of works carried out on site for the policy holder.
  • Card details are provided to our payment service provider in order for us to process payments.
  • If we have reason to believe it is necessary to process or defend against a legal claim, to comply with the law, to enforce our site policies, or protect ours or others’ rights, property, or safety.
  • In the event that we need to report accidents or incidents on site or request emergency assistance.


Cookies (Web Browsing)


Cookies are small files that a site or its service provider transfers to your computer’s hard drive through your Web browser (if you allow) that enable the sites or service provider’s systems to recognize your browser and capture and remember certain information.

We use cookies to compile aggregate data about site traffic and site interaction so that we can offer better site experiences and tools in the future.


Call Recording

Calls to our offices through any numbers displayed on our websites recorded for quality and training purposes.


Your Rights

At any time, you may contact us and request a copy of the personal information which we hold about you. You also have the right to ask us to amend the personal data which we hold on file for you. You also have the right to ask us to remove your personal data, except where the information is needed in order to process or defend against a legal claim. Removal of personal data may impede our ability to provide our services to you or force us to suspend our services to you altogether.



Unless we are informed by direct contact to our Head office via phone call, letter or email, we will assume that you consent to us retaining and continuing to use this data according to methods described in this document. If you require any further details in relation to GDPR, please do not hesitate to contact us so that we can assist you.


Contact us

Correspondence address: 44 Wellesbourne Crescent, High Wycombe, Bucks, HP13 5HF


Telephone: 0800 731 3843 (Leak Detection) 0800 043 5585 (Swimming Pool Leak Detection)



* Trenchless Technology Ltd. trades as ADI Leak Detection, ADI Swimming Pool Leak Detection and Trenchless Mains Replacement.


At ADI Leak Detection we are pleased to provide a nationwide service from our head office. We have engineers around the country ready to serve you, some of the towns we serve are:
Bedfordshire – Luton, Dunstable & Leighton Buzzard Berkshire - Ascot, Newbury, Maidenhead, Windsor, Slough, Wokingham & Reading
Buckinghamshire - High Wycombe, Amersham, Chesham, Aylesbury & Milton Keynes Cambridgeshire - Chatteris, Fulbourn, Huntingdon, Peterborough, Ramsey, St Ives & Soham
Cheshire - Altringham, Birkenhead, Cheadle, Chester, Crewe, Ellesmere Port, Macclesfield, Moreton, Runcorn, Sale, Stockport, Wallasey, Warrington, & Widnes
Cornwall - Camborne, Falmouth, Newquay, Penzance, Redruth & St Austell Cumbria - Barrow In Furness, Carlisle, Kendal, Whitehaven & Workington
Derbyshire - Burton on Trent, Chesterfield, Derby, Long Eaton & Swadlincote Devon - Barnstable, Exeter, Paignton, Plymouth & Torquay
Dorset - Bournemouth, Christchurch, Dorchester, Lyme Regis, Poole & Weymouth Durham - Darlington, Durham, Gateshead, Hartlepool, Stockton on Tees, Sunderland & Washington
East Sussex - Brighton, Eastbourne, Hastings, Hove, Lewes & Uckfield Essex - Basildon, Billericay,Canvey Island, Chelmsford, Colchester, Epping, Harlow, Rochford & Tilbury
Gloucestershire - Cheltenham, Cirencester, Gloucester, Tetbury & Tewkesbury Hampshire - Aldershot, Basingstoke, Farnborough, Fleet, Gosport, Portsmouth & Southampton
Hereford - Hereford, Leominster & Ross Hertfordshire - Aylesbury, Hemel Hempstead, Potters Bar, Rickmansworth, St Albans, Watford & Welwyn Garden City
Kent - Ashford, Chatham, Dartford, Dover, Folkestone, Gravesend, Maidstone, Margate, Rochester & Sheerness
Leicestershire - Coalville, Hinckley, Leicester, Loughborough , Melton Mowbray, Oakham & Wigston
Lancashire - Ashton, Blackburn, Blackpool, Bolton, Bootle, Burnley, Bury, Crosby, Kirkby, Lancaster, Liverpool, Manchester, Oldham, Preston, Rochdale & St Helens
Lincolnshire - Boston, Gratham, Grimsby, Lincoln, Scunthorpe & Spalding Middlesex - Enfield, Greenford, Harrow, Hayes, Hounslow, Northolt, Ruislip, Twickenham, Wembley & Uxbridge
Norfolk - Great Yarmouth, Kings Lynn, Norwich & Thetford Northamptonshire - Kettering, Northampton, Rothwell, Rushden
Northumberland - Blyth, Killingworth, Longbenton, Newburn, Newcastle Upon Tyne, North & South Shields, Wallsend & Whitley Bay
Nottinghamshire - Beeston, Carlton, Mansfield, Newark, Nottingham, Stapleford, Worksop
Oxfordshire - Banbury, Didcot, Henley on Thames, Oxford, Ruscote, Wantage & Witney
Northamptonshire & Rutland - Brackley, Corby, Daventry, Kettering, Northampton, Oakham, Wellingborough
Shropshire - Dawley, Donnington, Oswestry, Shrewsbury & Telford Surrey - Camberley, Farnborough, Aldershot, Guildford, Woking & Staines
Somerset - Bruton, Chard, Frome, Taunton, Wellington ,Yeovil Staffordshire - Cannock, Dudley, Newcastle under Lyme, Smethwick, Stafford, Stoke, Tamwoth, Wallsall & West Bromwich (Birmingham) North Somerset - Bath, Portishead, Radstock, Weston Super Mare Warwickshire - Ashby de la Zouch, Kenilworth, Nuneaton, Rugby, Southam
West Sussex - Chichester, Crawley, Bognor Regis, Horsham, Worthing Wiltshire - Chippenham, Malmesbury, Marlborough, Swindon, Tisbury, Trowbridge
Worcestershire - Kidderminster, Bromsgrove, Evesham, Kidderminster, Redditch
Yorkshire - Barnsley, Batley, Bradford, Dewsbury, Doncaster, Halifax, Harrogate, Huddersfield, Hull, Leeds, Middlesbrough, Rotherham, Sheffield, Wakefield & York