On 03/02/18 22:37, Simon T wrote:
It would help to know what type of tile and the age of the roof (or
house, if it is relatively new).

Here's a piccy I took last week of the hole

http://www.clipsfromthecryptserver1.com/temp/tile1.JPG

House is about 21 years old, I've lived here about 10.



Small overlap on those tiles (I have the same pattern but I'm sure my
tiles are taller and have a significant overlap).

You could add a nail to that tile if the course above is not nailed (use
aluminium nails and be gentle!)