Some of the above "ideas" are not encouraged in UK airspace; here are some of the UK's rules regarding R/T:
Do not use "to" when mentioning Flight Levels.
Use "to" when mentioning altitudes but remember to prefix the altitude with the word "altitude".
The word "re-cleared" should not be used.
CAP413 Chapter 3 1.2.3 a) and b) refers.