EBS variable mortgage - should we fix at 3.15%?

Asking on behalf of a friend, so I don't know all the details.

Currently paying 3.7% variable with EBS.

Can switch to fixed. either 1y, 2y, 3y all at 3.15%.

Does this seem like an ok deal?

LTV would be well under 90%, but how much, I don't know.

She says they can't switch banks, I think because their incomes are no longer as high, and one of them is now self-employed.

Absolutely they should fix. The question is only for how long.

I'd appreciate any feedback on the following post for their scenario to see if I can make it clearer / more informative. https://www.askaboutmoney.com/threa...gage-provider-can-i-get-a-better-rate.206767/