"Descend FL130, level ......... "

[5milesbaby]

Scott and Tired, thanks for the reply's, they both clear up some confusion for me at least.

Tired - you managed to rearrange my garble into the sense I meant from the looks of things!!! I know that the levels I use for the London TMA arrivals will be used without question between 0600 and 2100, and often an hour or two each side. It is very traffic loading dependant and also how accommodating the other controllers around are feeling. Also nearly all of the ones I issue (bar 2 I think) are written on the Jepps charts, likewise for all other LonTMA arrivals. I can understand that these are sometimes cancelled, but what I think should happen is that you comply with them at all times unless ATC specifically cancels them. Is that unreasonable???