need, you were asking why I am trying to save such a large sum. It's because I was one of those idiots who, due to a combination of factors, left the husband to deal with anything financial. And now I'm not anymore, but I've got catch up to do☺️
Pointless, if I may suggest, take advantage of the offers the banks make when you switch to them (£100 for free). So all your DDs would come out of this new account. Then, feed this account through a standing order, yours and your DH's chosen amounts. Use it excusively for bills and rent/mortgage, food and petrol. Took me 20 years, but it's so so much easier now!
In order to save, chose a regular saver account. First Direct has one that pays 5% interest, the max amount you can put in a month is £300. After 1 year you have £3780 aprox. Set it to come out of your account the same day you get paid. It'll be a bit meh in the beginning, but then you'll be so used to it, you won't even miss it 