Day 56 of self-isolation - more details on staying alert.

Another day, another Waitrose delivery. We had completely run out of vegetables. All we had left were tomatoes, and tomatoes are fruit. So now we'll be OK for another week.

Menu planning is done on the basis of expiry dates. So it's fish and chips tonight, because the fish that swam in from Waitrose have a short expiry date.

We have more details on staying alert.

More people can go back to work, provided they social-distance. We can now gather in groups, but only in groups of two (except same household). And from 13th May, we can go outdoors more.

We have to stay at least two metres apart; face coverings are recommended especially in shops and public transport. We already have our cloth face coverings.

Food retailers and food markets, hardware stores, garden centres (from Wednesday 13 May) and certain other retailers can remain open.

From 13 May,  tennis and basketball courts, golf courses and bowling greens can open, but only if you're alone, or with others of your household, or with one other person, but staying 2 metres apart. We've been walking along the public footpath that crosses the golf course; now flying golf balls will make that hazardous.

Clinically vulnerable people (which includes anyone over 70) are advised to stay at home as much as possible and, if you do go out, take particular care to minimise contact with others outside your household.

If you're in Scotland, Wales and Northern Ireland the rules are different - it's still "stay home".

We're in England, so our rule is "stay alert, control the virus, save lives". So let me explain the measures we're taking on this.

We would instruct the dog to bark if anyone approaches the house, except we don't have a dog. Maybe we should acquire one. But I do have a web cam that I can point towards the front of the house, and I'll use that, together with a motion detector, and play a recording of a dog barking if anything triggers it.

We will also maintain extra alertness at night. Ladysolly and I have worked out a rota for staying awake at night, and I have a walking stick near my bed that I can use if any virus sneaks in and needs to be controlled.

And we continue to alcohol-spray the incoming groceries, but now we're doing so more alertly.