I would pay off any credit card debts, loans and then the mortgage in that order.

Paying off your mortgage early will give you more monthly disposal income but you need to ensure you don't blow that if you are in savings mode. It also shows your mortgage lender you are a responsible borrower so hopefully that will count in your favour later if you need a bigger place.

If for some reason you need money at a later date and you have spare equity in your home you can always increase the mortgage so never a bad thing to pay off your mortgage early.

Right now savings returns are poor so it's mainly dead money.

I know we have at least 1 Financial Advisor on HOL if he responds I would follow his advice.

One more point

2.99% we are 3 years into a 5 year fixed term rate.

Hand over your savings to TUX who will stick the whole lot on litecoin..

Failing that I would pay off any other debts you may have (which will all have higher interest than your mortgage) if you have no other debts then personally I would start looking at setting up some sort of tax efficient investment vehicle which would outperform bank interest.

Much of this stuff though depends on how risk adverse you are?

If you want to be a steady Eddie than pay off your mortgage, if you want financial freedom then invest it.

"It feels much better than it ever did, much more sensitive." John Wayne Bobbit

We have no other debts or loans of any kind, so other then the mortgage no major expense going out. I honestly have no real idea when it comes to investing so it would probaby be a risk that would backfire. I’ve had people say to me to pay off bits here and there when you can on the mortgage but that will obviously cut into my savings which feels like my safety net in case anything goes wrong.

You have noooooooo blooooody idea how much i was tempted bud

That said, due to the ever increasing institutional investment we're seeing, then yes i'd certainly say buy some Bitcoin.

Buy Litecoin.

One thing which may seem strange is to get another line of credit going; be it a card or a loan.
I only say this as the more you can prove ability to pay the better your credit rating when you upsize.
Get a credit card and spend £100.
Then pay the minimum each month and when back down to a tenner spend another £100.
This may be like throwing money away but the interest will be a pound a month but the benefits will definitely outway this pound.
Strangely the more you prove your affluence the more people will give you and with a kid you might be surprised how much you will need going forwards.
Once you have one you will be offered interest free ones so just keep changing and it won’t cost a bean apart from maybe a couple of months interest-initially.
I was actually told this by someone in finance.
This advice is only personal so if you can keep your flexible friend tucked away it might come in handy later on.