Good old Mummy - I reassured him, saying, "Don't worry. If they give you a hard time just say - you come over to our place ALL THE TIME. I thought it was reciprocal."
(I also had a moment of genius this morning where I thought of the idea to suggest to the neighbours that we should just scrap this whole idea of new/mending fences and get rid of the fences all together! What with them passing through constantly, disposing of their rubbish/junk and coming over and moving stuff - practically a commune already - right?! This would be done in the hopes that the mere suggestion of such an idea would fill them with inexpressible horror - as the mere thought does for me!)