hi and thanks for your replies!

The person looking after them when we were on hols said that everything was ok apart from these strays comming in to the house, they just come through the catflap into the hall. The rest of the house was shup up so they could not go anywhere else.

They are still not comming in much and and are staying outside. We Have had to put another cat flap on the door cos Bella my big fluffy cat broke it and she is not happy we got another one. but give it time she will break that too.