I actually took it to my local tailor today, and she did a pretty decent fix on it with some heat activated waterproof seam sealing tape/glue type stuff . It probably wont last for ever, and it is quiye visible, but will get another six month out of it at least!
I happened to see this earlier, not used so no vouch but might be worth asking...
https://www.scottishmountaingear.com/repair-service