home swapping from Abergavenny to London

I regularly travel to Abergavenny to grandson sit while my son and his partner work. They both work from home and don't have much space so I really need a separate space to entertain my grandson during the day and stay over myself. Sometimes my husband accompanies me.

My grandson is 6 and is very well behaved and has been trained to respect things and people!

It is too expensive to hire airbnbs all the time and I am looking for someone who has a house or flat they would lend me for periods of 3 days to a week in return for spending time in my nice London flat. It would have to be in the town as we don't bring our car with us...

A chance to visit London for free!

I can provide references and so on if necessary...