We have all seen on the news which items are allowed on the aircraft (providing they are in a clear plastic bag)

But reports from Manchester airport are saying that retail and catering facilities are operating as normal and once through security passengers to all destinations (with the exception of the USA) can shop freely and take all products on board.

You can read the full story here:
http://www.manchesterairport.co.uk/

Unsure about other airports - I only checked this one as we are flying in 7 weeks.