If you are please ensure you follow the steps below:
Start by dialling the exit code for your country (011 for USA, 00 for Europe, see here for other country exit codes)
Next dial the country code for the UK (44)
Finally, dial either of the telephone numbers above without the initial 0
For example, if you are calling from the USA, dial 011 44 1223 926663 OR if you are calling from Europe, dial 00 44 1223 926663 (or, if calling from a cellphone from anywhere in the world, dial +44 1223 926663)
