Get to know Lock Assist


We are approved by West Sussex Trading Standards, ‘Buy with Confidence’ Scheme and Paul is a member of the Guild of Architectural Ironmongers. Our staff are DBS checked to give you complete confidence in our team.

Master Locksmith Association approved company. 24 HOUR SERVICE, No call out charge, free surveys and advice given.

Fast & Professional


Lock Assist was started in 2003 years ago by Paul Harper-Smith who was taken on as an apprentice by his Uncle Colin in 1983. Colin Harper-Smith worked at Chubb in London for many years before starting his own locksmith’s business in 1971.

Community Work


We love being involved closely with all of our local Sussex community projects. From sponsoring football teams, supporting club captain charity events and even mucking in with fete's and fayre's. Lock Assist are their to help!

Read some comments from our Community Work


  • Otters Class
    Dear Mr Harper-Smith, We are very grateful for your kindness and generosity shown, when you lent your fake skeleton (we named him Norbet.) He has learnt quite a fair amount whilst being here. Again we are thankful for your kindness we will try and list some things he has learnt with us, for example, the Egyptians, area and perimeter, muscles and bones, Christmas songs, grammar, and lots more. He was great company and we enjoyed having him around. We especially thought he liked Egyptian day because we did a lot of Egyptiany things. We think his favourite subject was science because he was related to it. All of the Otters class will miss him enormously! Kind regards Otters class.
    Otters Class
    St Wilfrids School
  • Donna Howland
    Your donation means so much to me, the staff at St Catherine's Hospice and the patients and their friends and relatives! Thank you so much again for your support.
    Donna Howland
    St Catherine's Hospice
  • Julie Blackham, PTA
    Thank you for supporting us…..in the Summer Fayre Programme this year, along with a raffle prize. Your generosity and support is very much appreciated.
    Julie Blackham, PTA
    Downlands School Association, Hassocks
  • Michael Aitchison, Captain
    On behalf of Hassocks Golf Club, I would like to thank you for your kind donation which was entered into the Captain’s Day Charity raffle and auction. The money raised, which I hope will be in the region of £4000, will go to my chosen charity for the year, Guide Dogs for the Blind Association. Once more many thanks for your help in making the day the success that it was.
    Michael Aitchison, Captain
    Hassocks Golf Club

Supporting our Commercial Locksmith customers in Sussex


We have 3 full time employed locksmiths including a time served carpenter so as well as locks, we can also upgrade and replace doors – particularly fire doors – including in-tumescent fire and smoke seals, stainless steel, ball-bearing hinges to BS EN 1935 and door closers to BS EN 1154.

Contact 24 hours

We have a large a varied base of commercial contract customers and domestic customers and offer a 24 hour emergency service if you find yourself locked out or have keys stolen.

Any building. Any lock.

Lock Assist have a wide and thorough knowledge of locks and architectural ironmongery gained from over 50 years experience in the security industry.

Certified & accredited

We are pleased to be accredited as an Approved Company of the Master Locksmith’s Association and the Institute of Architectural Ironmongers

Network covered

Experienced with Ministry of Defence, Government sites (including local councils, universities, colleges and schools) and solicitors and estate agents work. An extensive, all round locksmith’s service.

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