Not put as freebie as you may incur costs when booking higher priced tickets etc although you could get lower priced tickets.
Sign up now for £25 worth of free Seatwave vouchers redeemable on any tickets from their site. These have no restrictions whatsoever, apart from one voucher per purchase. That means even if the tickets are below £25 on seatwave.com you get free tickets. Yeah we know, this is an AMAZING deal.