Guys, dont' worry about the last question - I've already got the answer.
To clarify anyway - here it is thanks to BIK_116.80 .
Skydiving is classed as a private operation and a pilot with CPL can get paid.
Of course a PPL should not get paid although they are allowed to fly this kind of op.
CAO 20.1.9 (4.1).
A2107