Ive ordered a Polytunnel from First Tunnels nearly a year ago. I noticed that First Tunnels and Premier Polytunnels were very close to each other. I thought they might be the same company, when I rung them both I disocvered that Prmeier Polytunnels were a new compnay and the director once worked at First Tunnels.
I cant praise First Tunnels enough, they have a Facebook profile (very informative) -
www.facebook.com/polytunnels and if you scroll through the comments of the fans you'll seee that Im not the only one who thinks so.
Id vote for First Tunnels, but my advice would be to contact them both, decide which compnay you prefer and then drop the competitors name, and you might squeeze a discount of them.