Understand PRS vs PPL
UK artists commonly confuse these two:
A UK artist who writes and records their own music needs BOTH. If you only write (don't record) you need PRS only. If you only record (cover artist or session musician) you need PPL only.
UK artists regularly miss PPL because they assume PRS covers everything. PPL royalties from radio and TV can be substantial — the same record played on BBC Radio 1 generates both a PRS payment to the songwriter and a PPL payment to the recording artist.
Registering for PRS but not PPL. Both are required for full coverage if you're a recording artist.