Yes, there is a maximum age that you can have Mortgage to, usually around 70/75 if you can prove affordability to pay after retirement. However you would have to made full repayment at that time and show now where the funds would come from.
The other options would mean that you would be accruing the interest until sale or death which can get to be high sum. Or you sign over % of your house, of which you will not be paid the full amount. This will also be repaid as above, but both parties benefit from any growth.
Mainstream Banks are not into this market, it is mainly insurance companies and specialist companies. A lot of careful thought is required.