+44 (0)20 7621 7836 
+44 (0)20 7621 7836
We have been CE & CE+ Certified Body since 2017.
Computer Security Technology Ltd and Cellar Systems
Dawson House
5 Jewry Street
London
EC3N 2EX
P: +44 (0)20 7621 7836
F: +44 (0)20 7099 6878
E: info@cstl.com
What3words location: ///rested.metro.rings
Aldgate 3 mins walk, Fenchurch Street 3 mins walk, Tower Hill 3 mins walk, Tower Gateway 4 mins walk, Aldgate East 6 mins walk, Liverpool Street 8 mins walk, Monument 11 mins walk, Bank 11 mins walk
Please find below the technical support details to contact vendors directly for urgent tech support issues.
On exiting Tower Hill Tube station, keep The Tower of London (and the Thames) behind you and head North up alongside Trinity Square, this will shortly become Coopers Row. Turn right into Crutched Friars, this becomes Jewry Street, Dawson House on the left-hand side close to Aldgate High Street.
Turn right into Aldgate High Street (heading West), you will come to Jewry Street on the left-hand side. Turn left into Jewry Street, Dawson House is very shortly on the right-hand side.
Once on Eastcheap (heading East), pass the post office and Tesco's. Turn left into Philpot Lane (Walkie Talkie building will be on your right), continue and then turn right into Fenchurch Street (Walkie Talkie building remains on your right-hand side). Continue walking, passing East India Arms pub on the right, shortly after which you will come to Jewry Street on the right. Turn here and we are on the right-hand side.
On exiting Bank Tube, walk straight up Lombard Street (heading East), follow this onto Fenchurch Street and continue walking (Walkie Talkie building remains on your right-hand side). Continue walking, passing East India Arms pub on the right, shortly after which you will come to Jewry Street on the right. Turn here and we are on the right-hand side.
Exit onto Cannon Street, turning right (heading East), continue until you meet the junction with King William Street, Gracechurch Street and the road running to London Bridge. At this junction you should carry on straight over (heading East) onto Eastcheap, then follow the instructions above from Monument Tube station.
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We operate a 3rd party accredited Quality Management System (QMS) to provide consistent and improved level of Customer satisfaction, please address any related issue to our Quality & Customer Care officer: Michelle Johnston Tel: 0207 621 7837.