Just a day session brolley Rich?
There’s so much choice out there now from brollys with a central stick in the mud pole right up to brolly shelters with doors and ground sheets where they are literally one step away from full blooded bivvies and everything in between.
if it’s just to pull out when things start to open up I’d say 45-50inch ribs is plenty big enough.
look for one that has the ability to put a couple of pegs in the back when set up in the 45° as that is the real difference between something useful and something that’s gonna suffer with wind.
id also look at spoke design as well.
Alot of them, the spokes take up a huge amount of room preventing you getting to the back and some have clever designs keeping the spokes right back.
I have an ovel chub brolley I bought second hand as a quick replacement for one that broke and it’s been great for day sessions, takes a couple of pegs at the back and a couple of storm poles but the spokes on mine take up a lot of head room and I’ll consider more that next time I buy.
Shame really as it’s extremely good quality and a rock solid thing. Perfect actually other than the low spokes.
if you’ve got the budget I’d say look at the fox specialist as it does tick all the boxes and they do it in a perfect 45” size but with the spoke design being so great it’s probably got more room under it than most 55” brolleys.