The IMF don’t have the money to bail out the UK, even if they wanted to.
There’s nobody who is going to arrive to save the UK.
What will happen is that this incompetence will continue until the Government either cannot sell its gilts as there is no market for them, causing a fiscal crisis, or the rates the market will buy them at will be so high that the Government cannot pay it without huge devaluation of GBP (Harold Wilson, anyone?). Even that (and the extremely sharp resulting crash in UK living standards, the like of which seems incomprehensible to many people) still wouldn’t resolve the issue because unlike comparator countries the UK has issued a significant proportion of its debt index-linked so it cannot even inflate away a large chunk of it! Also extremely unwise to be running an enormous and ever widening trade deficit and importing huge amounts of inflation when you are reliant on imports for a large proportion of basic necessities like food and energy.
The UK electorate seems to think that it has some kind of inalienable right to a standard of living not enjoyed throughout most of history and still not enjoyed by the vast majority of people on Earth. There is absolutely no guarantee that this will continue, in fact it is highly unlikely to do so unless significant steps are taken imminently to rebalance the economy and tax system and create growth. Other countries will not care about this at all, just as the UK population is quite happy getting on with daily life in the knowledge that there are people living in poverty around the world. No knight in shining armour, IMF or otherwise, will come to save us.
The decline in productivity and growth relative to the rest of the world compounds very quickly. In another decade it will be far too late to turn it around. We can very quickly become a poor country. Our GDP per capita is already woeful internationally compared to where it ranked just a decade ago.
The choices are either appropriate, obvious steps are taken now and the electorate accepts that “tax everyone but me more to pay for what I want!” is not a viable economic strategy and has a 100% chance of making them poorer as well, or (far more likely because we have no politicians with any backbone or morality and all they are interested in is being elected again, not doing the right thing for the country and its citizens) politicians will continue actively making the problem even worse while the electorate cheers them on until there is a fiscal crisis and then the economic shock will be ten times worse and people will find that their benefits, state pensions, public sector pensions etc simply will not be paid.
The UK electorate is so poorly educated in basic economics and so incapable of thinking rationally rather than wasting time with class wars and irrelevancies and blaming the state of the economy on issues which are effectively a rounding error in the national budget that I presume the latter will be the case and it will take many decades to recover from and all be far more painful than it needs to be if we had competent politicians who would take sensible steps now.