How can I make 12k work the best?

[Mandalorian]

In a few months time I shall have £12k which I want to put aside for DD for a house deposit. She doesn't live locally at present but is looking to move back with her partner in 2-5 years and buy a house in her home town where it's a lot cheaper.

Whats the best way of investing this money but still be able to lay my hands on it within a couple of months of her telling me she's coming home?

I'd put it in a cash isa, but I'm not the most savvy of investors!

If you give it to her she can put it in a LISA and get it topped up by the government, which is likely to beat any interest or stock market growth!

I agree that a LISA is a good idea. She can save 4k per year and will have 1k top up. I'd invest it in a decent fund although nothing too risky as she'll need the deposit soon.