[devonbarmygardener]

I was hoping someone would say that .I'm dying to put it up

A polytunnel is great and I wouldn't be without mine now - but put it somewhere sheltered as I've seen too many on my site get demolished during a winter gale force wind.  Even if well anchored, a strong wind can rip the cover or buckle the frame.

Yes do anchor it REALLY REALLY well
I was one of those who lost my new poly last autumn