Make sure you have a passport, because myself and someone else spent the best part of an hour or two trying to past Google's I'm not a robot when trying to get a passport. The fact Govt uses Googles I'm not a Robot should also show you there is more to Google than meets the eye.
I can see why the rich have dual citizenship and multiple passports, with the richest having diplomatic passports, making them untouchable anywhere in the world!
It might seem like a lot of effort, but when you realise who easy it is to set people up, buy off judges, police, medical experts, etc, you'll realise blackmail can come from everyone and anyone including your family, because there are some messed up beliefs out there.
This is good advice, always have some cash around; in these uncertain times, I'd even argue to increase the amount. Make sure to have a record somewhere that you have it (a photo on your phone with e.g. ID and a dated newspaper? I dunno) so that IF you get your home broken into, you can prove it to your insurance.
Of course, there's plenty of places to hide a stack of bills, or distribute it across multiple spots.
If you're concerned about the downfall of the economy, you can get 'slabs' of valuable metals as well, that can be broken off into smaller denominations. The downside of going for those (at least in NL) is that you can't really use them to bet on the price of gold going up or down, because as a consumer you have to pay VAT for them (21%).
Also always keep £500 rolled up in £20 notes somewhere. And make sure you don’t put all your eggs in one basket.