Best way to maximise inheritance please!

Leponge

We are fortunate to be shortly getting £100,000 inheritance from my mum (though I'd much rather still have her around). The Estate is not yet finalised, this is an interim payment, we may get an additional £30,000 or so when everything is completed. We are currently mortgage free having lived in our house for 25 years, but are currently on the market looking to up size and potentially buy a property requiring a £199,000 mortgage (to include moving costs - Estate Agents, Solicitors etc). What advice would you give on how much of the inheritance we put towards getting a lower mortgage? We are older parents with 2 dependent sons currently, our mortgage offer is for 13 years when my husband will be 75. We don't have great pensions so I would like to invest some of the money to use for that if needed and also for our sons in the future. I feel some should probably also go in savings to increase our emergency funds. Looking forward to hearing your views please... thank you!