Thanks for the advice to both of you. I think what I might do is weed the strawberry bed and leave the strawberries there. They actually produced the runners you mentioned a few months ago - not really checked recently so not sure if they are dead. Given that I have left them will they just root in where they are and die back, and can they be dug up and replanted in the spaces between original strawberry plants?
For the potato bed I think I will weed it and plant the green manures you suggest. Do I do half the plot with one manure and the other half with the other, or can it all be mixed together? And do both types you mention simply get dug in to the soil next year?
I will peel back a bit of the plastic weed and dig over a bit, and plant some onions and garlic.
As for fruit, we inherited redcurrent and blackcurrent bushes. Around March time I pruned them down by about a third - I had no idea what I was doing and the guidance I read online about pruning just confused me about new and old branches etc. Anyway, I trimmed away and somehow it all worked out fine and we had an abundance of fruit.
Also inherited a row of raspberry canes - I had no idea what to do with them - they all looked dead - brown wood. Anyway, trimmed them down a bit and somehow they produced loads of fruit. When I read about summer raspberries I was once again confused about old and new canes - mine all looked old but they still worked really well!
Have had loads of rhubarb growing in one corner, which we also inherited - it just appeared! The leaves were getting out of control about two months ago and cos it had been growing for a few months I ripped it all up, thinking it was coming to an end. Surprisingly I have had huge amounts of rhubarb regrow!
In summer time I did buy some trees - a pear, a braeburn apple and a plum tree. They were about 4 or 5 foot I think, no fruit off them yet. Two of them I think I planted too close - about 1.5m only perhaps, but hopefully they will still be ok. I would like to get a cherry tree, but have never seen semi-drawf ones in the shops - are they available. Also considered a nectarine.