I am starting a new printing business, on t-shirts and canvas and wondered if anyone could tell me which are the best trade shows or events to attend in the UK?
Whilst I appreciate you're keenness in asking questions, I do think your time would be well spent reading some of the forums in more detail. Many of your questions have been covered on numerous occasions, a quick look down this particular section will immediately answer this particular question
Are you look for shows to help you in buying/sourcing equipment?
or
Are you looking for shows to sell your products?
If the latter, are you wanting to sell to the public or to trade/wholesale clients?