Thanks for your reply.
It has always been a breach of copyright (and remains so) to record TV programmes onto VHS tape, other than for 'time shift' purposes. i.e. you're allowed to watch a programme at a time later than when its transmitted but not to retain a copy of that programme indefinitely. (You're meant to wipe the tape after you've watched the programme).
The same applies to recordings onto DVDs or hard drives. It's because of the 'time shift only' rule that programmes only remain available on BBC iPlayer for a limited period.
However I very much doubt that 'officialdom' will come knocking on your door, either to challenge you about copying iPlayer programmes onto DVD or to ask why you've still got an ancient edition of Noel's House Party on VHS ;-)