This is nonsense, recessions aren’t inevitable, they don’t fall due. They’re a reault of mismanagement. Australia hasn’t had a recession for 29 years.
Anyway, OP, Britain will continue to have money troubles until there’s all of
(a) peace in Europe,
(b) no pandemics for 5+ years,
(c) either a new source of cheap labour to replace Eastern Europeans, or scrapping of minimum wage and workers rights, and
(d) competent politicians.
Honestly I’m guessing 2050ish. (Assuming climate change doesn’t get super expensive and that WW3 doesn’t kick off.)
It’s also worth being aware that Britain doesn’t have to be a wealthy country. We cruised on ex-Empire wealth for a very long time but that’s over now. Then we relied on a strong economy and being part of EU but that’s over now too.
Plenty of countries are fine for a while then mismanage themselves m into a downturn spiral they can’t escape, look at Argentina, Iran, even Afghanistan.