propertyfinder.com have teamed up with Grand Designs Live London to offer free weekday tickets for the show
Voucher code - FREEPF
ExCeL Exhibition Centre
London One, Western Gateway, Royal Victoria Dock, London, E16 1XL
Normal ticket price is £10 - £15 depending on time of booking.
I have been to the show before and it is interesting if you like that sort of thing.
Link - http://www.seetickets.com/granddesigns/login.asp