Proving bags a la GBBO

[JLG19]

I'm always impressed by the massive proving bags used in the Bake Off, but have no idea where to get them from. The usual suspects (Lakeland) don't seem to have anything similar. Any ideas, wise MNers?

www.amazon.co.uk/Polythene-Plastic-Food-600mm-900mm/dp/B004ZF4ZIO/ref=mp_s_a_1_1?ref=plSrch&keywords=proving+bags&dpPl=1&dpID=41k0hfjQsxL&pi=AC_SX236_SY340_QL65&tag=mumsnetforum-21&ie=UTF8&qid=1536774894&sr=8-1

50 of them! I use them all the time, they’re so useful.

Off to order some too. Thanks

Amazing, thanks!

You'll know.

What is a proving drawer?

Is it heated? Ventilated?

Funny you should ask I was only wondering this the other day www.google.co.uk/amp/s/www.cookersandovens.co.uk/blog/what-is-a-proving-drawer/amp/

Thanks.