As has been pointed out already on other threads, there are some (perhaps slightly surprising) changes to RT procedure in the latest CAP413.
Not many pilots seem to be aware of these.
- "Roger" means "Your message received". It no longer implies "... and understood"
- "XXX 123 monitor tower on nnn.nn" is no longer used. Instead you will be getting "XXX123 standby for tower on nnn.nn"
Not aware of these? Perhaps you should go
here and print youself off a copy.