Key workers and childcare - what to do?

My MIL usually looks after our children two days a week. The government advice is that grandparents should stay away if they fall into any of the categories such as over 70, underlying health issues etc. though MIL is in good health and in her 60s.

Even if schools are open for children of key workers like me and DH, the children still need taking and picking up and then there are the holidays to think about too. We don't live in the same household so the new rules mean we shouldn't be mixing at all and we all want to respect that, but what alternatives are there? Interested to hear from anyone who might be in this sort of situation and what they are doing. Not going to work is obviously not an option but the DC are too young to be left alone.