How isn't it benefiting Britain again?
The GBP is at its lowest value since 1985, and if they hope to continue trading with Europe (which is advisable due to transport costs), they're going to have to comply with regulations and fees anyway. The payments to the EU weren't even that high when the direct monetary benefits are subtracted from it; and while that number may be slightly lower post-leave, they'll still have to buy into the European market.
And that's not even to mention the negative diplomatic effects on the United Kingdom, or any unrest due to Scotland's opinion on the issue (which may or may not lead to them leaving). Either way, I won't have any sympathy if the UK is screwed over now.