While it certainly looks like Labor is set for a blowout unfortunately for them conservatives in the UK have already fucked the country in ways that will likely be impossible to fix.
Brexit had large costs to the UK economy, mainly in increased tariffs and decreased foreign investment. That's going to make your country permanently poorer, or at least poorer for a good while. The UK can't rejoin the EU, at least not on the terms it had, and so there's only so much to be fixed. The UK voted to make their country poorer and now have to come to grips with the fact that Brexit was always a stupid idea.