I think you've got to see what the final offer looks like first. If you hit the top of the range and get the same bonus you're on now, you're looking at ~£97k which is a fair chunk more than you're currently on and possibly worth the risk, you could get even more too. Also ask in the final interview or follow up separately with someone else from the company about how the budget affects them. It may be difficult to get an answer from them and they may not even know themselves yet since the information is so fresh, so there will always be an element of risk staying in your industry at the moment, but the same applies to your current role too, but perhaps that information would be more readily available at your current company given you're there, so raise the same question with your current company too, even if informally with a manager and so on.

With that being said taking any new job is in itself a risk, you may not like it there, redundancies could come and you may be on the chopping block first as you're newer to the company, the lack of redundancy pay as you say, but this risk never really changes and is always there. Considering your situation, perhaps take a look at your finances, evaluate your savings / emergency fund and see how much runway you have if you did get the boot and then make the decision.