Agree that property right now is very very risky. If prices drop after you buy, that £50k could literally disappear into thin air. Although if you can keep reliable paying tenants in the property, it could still pay off in the long term.
Definitely park it in premium bonds for now if you don't have any. Until the payout rate drops, it's probably the best investment you could make with zero risk where you can get the money back quickly.
I'd also be very cautious about bonds, which is generally lending money to companies. If those companies go bust, your money is lost. And it's likely that more companies will go bust over the next couple of years. But it's probably possible to spread the risk by investing in 'bond funds' but I don't know anything about those.
The other question I'd ask is how secure is your income and do you/your partner 'have' to work? If your secure financial position is based on one or both of you staying in a well paid job, think about how long your savings and investments would last if you lost your job and couldn't find another one quickly or had to take a lower paid job.
If you have a high income, high cost lifestyle, it could all come undone very quickly if you lose your income and can't find a similarly well paid job. You wouldn't want to put all your money into property if you need it back in the short term when prices could be lower.