Luton26 has a SID (OLNEY) which limits you to 5000' until so many dme off BNN then 6000' - however the clearance is ALWAYS given as the SID with cleared level 5000 until advised. 9 times out of 10 you don't complete the SID anyway, once in a while you do complete the SID but have to wait till London gives the OK to climb above 5000. Surprised they dont just change the sid to 5000' full stop!
