Slouchy leather weekend handbag for less than a hundred quid

[BehemothPullsThePeasantsPlough]

My beloved old M&S weekend bag has given way at the zip after many years of sterling service and I don't think I'll be able to get it repaired economically.

Does anyone fancy linking me some suggestions for a decent quality leather shoulder bag, in brown, blue or green, slouchy and medium sized with lots of internal and external pockets, able to swallow a paperback book and a small bottle of water without complaining. Budget up to a hundred quid: something with a higher RRP but temporarily discounted would be good. Definitely no more because I'm a notorious bag trasher, and this is going to be slung about in parks and castles, be nibbled by various pets and wildlife and have all manner of stuff leaked onto/into it so I don't want anything I'd be paranoid about damaging.

Thanks.

something like this OP? www.etsy.com/uk/listing/461083968/navy-leather-hobo-bagshoulder-hobo?ga_order=most_relevant&ga_search_type=all&ga_view_type=gallery&ga_search_query=leather%20slouch%20bag&ref=sr_gallery-1-35&organic_search_click=1&col=1

Sort of like that sleep, thanks, but you’ve reminded me of my other two stipulations.
A) fully zipped up (a lot of tube travel)
B) available in a physical shop so I can try it in person. (am in London so any UK physical shop chain will do)

ah, in that case i would try here, it is usually £179 but they have 25% off, making it £134 . it fully zips up