Thanks Tom,
I started to catalogue on rebrickable initially to see what MOCs I had the parts in my collection to be able to build and also for sets I've missed to see what I might be missing part wise to enable me to build and so on.
As my collection got bigger it also became useful for keeping track just in case I ever had to replace anything God forbid something was to happen in the house. However, in the event of a catastrophe most of our collections would not be covered under general home contents insurance as far as I know. I don't know if anyone has ever looked into insuring their Lego, may be worth a thread. I contacted a broker in Galway and never heard back so must try a few more maybe further afield.
If anyone is interested in labels for their part storage Tom Alphin (brick architect) does some great ones for the most common parts, adding new ones every month or 2. You do need a Brother label printer that you can hook up to a PC to use them but they are very good. He has a lot of other interesting stuff like part colour studies and a guide for making the most of Lugbulk purchases (haven't got to that one yet).
This is the site anyway
https://brickarchitect.com .....why I replied in the first place :-)
All the best
Seán