Rotorspeed
Yes but Rule 5(3)(a) relates to en route flying, not taking off and landing, does it not? And you are talking about the take off phase.
5(3)(a) does not say it only relates to en-route flying
Otherwise how do you think a single could ever legally make a confined area approach or take off?
Either at a training aerodrome, at a government or licenced aerodrome where you are exempt or with a CAA exemption
Otherwise you will of course make sure your approach and departure route into the confined area allow you to meet 5(3)(a) ..
If you would like more info, PM me your number and I'll call you. Alternatively call CAA GA dept, Training Standards, your FOI or legal department ...
may I politely suggest we move back to the issue ....