i recently bouthgt a Chub Discovery dome cost 100 notes double skin lovely and warm in the winter.
a good bivvie which many of my angling companions have raved about is the new JRC bivvie just under ?200 plus it includes a winter skin for all those cold frosty nights
jus seen ur post and i reckon for under 20syuids my 2 favorites would be the JRC romer dome and the Oval plus brollie. personally for short sessions i like a nice low brollie!