O2 have reported that an outage to O2's network last week was not related to the UK airport alert that also happened on Thursday, but was caused by damage to cables owned by BT, connecting O2 with BT's fixed line service. The outage affected some mobile phone services in parts of London, Essex and Kent were affected.

I was testing some new mobile WAP services in central London that day, and oddly O2 was the only carrier that worked flawlessly.