Re- Not illegal before -

Pub sessions (over 2 people) in unlicensed premises - would be an illegal event - The Landlord could be charged with a fine of up to £20,000 plus a custodial sentence of six months (this exist at present and is not new to the proposals) - If musicians, singers etc. were aware no license existed - they could be charged with aiding and abetting.

Busking et al are locally normally dealt with by the Police using bylaws, obstruction, public nuisance etc - an arrestable offence - would think illegal...