Thank you so much for all your help and advice.

I have been in touch with a behavourist and they have also given me some suggestions, which I'm now putting in place.

I have increased their exercise throughout the day and starting leaving the TV on during the afternoon. I think the changing of the clock has really thrown them out of their routine, which hasn't helped.

I have been in touch with our neighbours and explained that we are trying all these things to help the situation and they seem okay.

Again thank you so much for all your suggestions.