So if you file IFR from EGCC to EGSH via TNT you should file ODD[FL] then after leaving CAS, ODD+5[00]. In practice, you are "usually" working an ATSU, so you will [Probably] be given a type of Radar service...[.not going there] and given instructions...If you are VFR, you can Legally fly at any height below FL245 on your own look out........
Hope tis helps....
Happy Landings
Edited by chiglet, 22 December 2007 - 05:18 PM.