If you’re not satisfied with Gerard V’s performance then he won’t charge you for it and will refund
the cost of the show
(less the cost of travel).
No questions asked. Just tell Gerard V within 2 days of the show and you get your money back.
This applies to bookings made direct with Gerard V (if you went through an agency then the agency will provide their own guarantee - check your agency contract as Gerard V cannot control that part of it).