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Might just make it this year

The 2010 event will take place over the weekend of the 7th & 8th August, at The Royal International Pavilion Llangollen, at the base of the famous Horseshoe pass, which was recently voted in the top ten rides in the UK.

The show will once again include wide range of bikes on display, exhibitors, attractions, features & entertainment. The Custom Bike Show introduced in 2009 will return (more details to follow), there will also be more bike parking spaces on site

http://www.themotorcycleshow.co.uk/

I went last year. Thought it was pretty good - well-attended, and some interesting stuff, particularly the custom bikes.
I'll probably go this year, weather & family permitting.