That appears to be the new, improved version of The London Acoustic Guitar Show, which used to be the LBGS's twin show before Blaze was acquired by Future Publishing.
Looks good, as it now comprises both acoustic and electric. I'd love to attend BUT - on Sat 29th we have the South East Bass Bash, and when we leave the bash, Happy Jack and I have to rush to a gig with one of his bands. That means I'll get home early in the morning on Sunday, and will NOT feel like getting up at any useful time to travel to Olympia on the day. Maybe next year.