Saorview Connect Combi Box with existing Sky dish?

You can, to use the same cable you would need to buy two of the below and combine the cables outside and split them at the tv.
https://www.amazon.co.uk/Konig-SAT-UHF-VHF-Combiner/dp/B0013D9ZR2/ref=sr_1_1?ie=UTF8&qid=1539767777&sr=8-1&keywords=sat+tv+combiner

If you want you could use of these behind the TV point instead of using two of the above:

https://www.amazon.co.uk/Quadplexed-Satellite-Aerial-Wall-Socket/dp/B003XN1TJ2/ref=sr_1_4?s=electronics&ie=UTF8&qid=1539767872&sr=1-4&keywords=tv+sat+socket

jack presley wrote: »

Thanks for that. Another month with Sky but this is good to know so I’ll be ready when the time comes

You could make the changes in advance, it won't impact the sky.

You will need to use F Connectors, so you need to check if it's standard size coaxial cable or micro size as this will determine what connectors you need to purchase.

I can recommend a place to get the stuff in Dublin if that helps.

If you have Sky Q, the LNB won't work with any other box, unless it's a 6 port hybrid LNB. If it's not Sky Q, any satellite box will work fine.

There's a thread about the Connect box, it has gotten mixed reviews so have a read of it first before committing.