Greenhouse glass

You might want to consider making up some panels using polythene sheet, the kind used for polytunnels. Depends if you can live with the look I suppose, but it's going to be cheap and easy to make & replace.

Another reason why I chose glass is because I like to sit in the greenhouse during storms and look out. Difficult with opaque poly sheet.

My grandparents had a similar set-up and the twin-wall just filled up with all sorts of crap and was nigh-on impossible to clean. I don't think I'd choose it personally, but it's not bad for a diffuse light source when it's clean.

Seconded! Glass is trivial to cut, whilst the only satisfactory was I could do it is with many, many gentle passes with a very sharp blade.

Still no one wanting to drive to Hertfordshire and reduce my pile of hardened glass:-)

d-i-y cold frames, green house extensions (buy the aluminium and use my glass)

It breaks my heart I couldn't get to it :D

(How heavy do you estimate it all to be?)

Pallet job. They must have come on a lorry around 2003 but I have no idea how the sheets would be packed for transport.

Originally from these people

I have repurposed the actual frames to keep Pigeons and Cabbage Whites off my brassicas:-)