L-AB
You have probably been incorrect for quite a while, let's say. It's been a few years since the UK adopted the ICAO procedure, as highlighted above. I must say that it's one that I think unwise, with the potential confusion with 1010, but that's ICAO for you - run by international committees of many people without English as a first language. However, you will notice European pilots being meticulous with their readbacks of "1-0-0-0" - perhaps because of the confusion potential!
UK - hectothingies - probably the next but one amendment to CAP413 - November-ish 2011.
2 s