Our team offers fast and professional locksmith services from a single replacement door or window lock to more specialist access control systems. We are open 24 hours and ready to go on first call as we understand the meaning of prompt reaction. High Barnet Locksmiths 020 8090 4625. The team at High Barnet Locksmith are all courteous and professional, from the moment you call to the technician tidying up after the work has been done. We guarantee customer satisfaction through providing the best service possible.