There is absolutely no way this version of events is true.
Firstly, it is illegal and even treasonous for any 'diplomatic source' emanating from the UK embassy to release such information.
Secondly, are you kidding me?! Two guys sat in a bar consitutes a terror threat? How can that possibly be plausible?
Answer, it isn't. But hey, let's not make the UAE seem like a dangerous place, don't want to scare all those tourists out of the shops whilst they're busy spending.
The irony is, all the govt here has to do to make this place seem safe, is list the number of terrorist attacks the country has suffered as opposed to somewhere like, oh I don't, London.
London - 134
UAE - 0