I listed some of them.
MSE is a good place to take a look around the different savings account type and do some sums to see which works out the best.
Problem with ISA's is the rates are shit. The 123 account is paying something daft like 4% on 20K and if you're only a 20% tax payer then that's beating most ISAs that are not on a long term fix.
I'm talking about it, but I'm guilty of having shitty ISA's when I should be using the 123 account and earning more interest.
Even if one had a large sum of money in ISA's, with current rates and the fact that you can soon transfer 15K cash, it's just dumb having tax free ISA's verses the 123 rate if you only pay 20% tax.
If/when interest rates go up, you could then start dumping the 123 cash back into the ISA's to the tune of 15K/yr.
Just not got around to it yet...
Think I might be wrong about natwest, they might still be doing the "first home saver" account. The bonuses:
Amount - Cashback
Over £50,000 - £5,000
Up to £50,000 - £2,500
Up to £25,000- £1,000
Up to £10,000 - £500
£500 to £5,000 - £100
And a little trick to bear in mind that worked with the account when I had it, the money in the account allowed you to qualify for the bonus.
It didn't all have to be used for the deposit !!
"The amount of cashback is based on the lowest savings balance in the 6 months before the mortgage is drawn down"
So if you can beg borrow or steal enough to get you over 50K for 6months, then you'll qualify for a 5K bung and can use that for your mortgage deposit and give the 33K (or whatever) back to where-ever you got it from.
Since you don't use it for the deposit, it's not classed as a gifted deposit and if you aint using it on the application where you got it from wont be questioned.
Sneeky eh
I also wonder if it were possible to get an unsecured loan to boost the account.
That might affect your mortgage but you can show that you have the assets in cash to offset it and again it wont factor the mortgage because you wont be using it for a deposit.
Strongly suggest you read the small print if you wanna be that ballsy.
oh and check out the PB calculator on MSE.