If she was paid it's in direct contravention of section 3.3 of the broadcasting code.
3.3 No payment, promise of payment, or payment in kind, may be made to convicted or confessed criminals whether directly or indirectly for a programme contribution by the criminal (or any other person) relating to his/her crime/s. The only exception is where it is in the public interest.
If she was paid it's in direct contravention of section 3.3 of the broadcasting code.
Complaints to OFCOM can be made here: https://stakeholders.ofcom.org.uk/tell-us/specific-programme-epg