UK Cap 413 - cut and paste...
The word ‘to’ is to be omitted from messages relating to FLIGHT LEVELS.
i.e. Climb FL70 - Descend FL50
All messages relating to an aircraft’s climb or descent to an ALTITUDE employ the word ‘to’ followed immediately by the word ALTITUDE.
i.e. Descend to altitude 2000 - Climb to altitude 4000
I believe the following are also good disciplines to practice - Once again Cap 413.
The phrase ‘re-cleared’ should not be employed
When transmitting messages containing flight levels each digit shall be transmitted separately. However, in an endeavour to reduce ‘level busts’ caused by the confusion between some levels (100/110, 200/220 etc.), levels which are whole hundreds
e.g. FL100, 200, 300 shall be spoken as “Flight level (number) HUN DRED”.
The word hundred must not be used for headings
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it's a jungle out there - keep the non standard RT on the ground ( not from Cap413 )