Newest 'Sky Q' boxes do not need any cabling for other rooms using a 'Sky Q Mini' and the Wifi in the house.
Do yourself a favour and network them with a network cable anyway. These abominations are designed with built in spectrum pollution which by design will kill legitimate uses of radio spectrum in the neighbourhood. While WiFi should work, that's vastly inferior to wired networking.
But back to the original question ...
The answer is to install flexibility. Unfortunately, modern building methods are the antithesis of that - being careful to make future maintenance as hard as is possible.
So my recommendation is this. Install DEEP boxes - for all AV stuff my preference is 47mm boxes, 35mm if it's something like my current house with 'kin 'ard brick. In a new build, sinking 47mm boxes at first fit stage is a doddle. Install conduit (the white oval stuff is fine, I;d suggest 32mm for the main points to give plenty of room), but here's the bit your sparky will baulk at - the conduit must go INTO the box. Standard practice is to stop the conduit 1/2" or more from the box so the cables can dogleg through the pre-punched holes in the box - this makes pulling cables in "problematic" at best. Some sheet nibblers can quickly open up the hole to take even the widest conduit.
If he suggest that the way to do things is to clip the cables to the walls and then plaster over them - then find one that isn't a complete tool.
Then make sure that you can get under the floors in order to make use of this flexibility. Again, modern building methods are designed to stop this. In the past it was easy to lift a floor board or two - use a rod or cane or something to fish cables along between the joists (from one lifted board to another) and thread them through the joists along the line of a lifted board. No they insist on using large sheets, glued together and to the joists. Complete and utter PITA for maintenance. In the house a relative is planning to move into, I see they've put 2 or 3 full height noggins between the joists as well so you can't even fish along the joists.
Done this way, you can change the cabling if/when technology changes
In the meantime ...
Run 2 or 3 coaxes to the "master" TV location - 2 for satellite (though Sky Q can now use just one I believe) and one for terrestrial.
Run 1 or 2 coaxes to the TV point in other locations - one for sat and one for terrestrial.
And run at least 3 (yes three) Cat5e or Cat6 cables to each location.
All these cables need to go back to one central location.
For watching one sat box elsewhere, use an HDMI over 2xCat5e/6 sender at the master point and a matching receiver at the other end. You can also get HDMI switches and splitters that do 2xCat5e/6 for each input and output - you can put one of these at the central location to split the signal to multiple rooms.
For the sat and terrestrial, several options ...
Split the terrestrial signal - with a passive splitter if you have a strong signal, a distribution amp otherwise - and feed down one coax to each room.
For a small installation, take multiple outputs from the sat LNB and connect them directly to the coaxes to each room. Once you get past about 4 points, you might as well use a quatro LNB and a multiswitch.
If you go down the multiswitch route then you can save on coax as most units have a 5th input to send the terrestrial signal down the same cable as the satellite signal (and then use a diplexer outlet to split them at the other end). For this reason, you might choose to use a multiswitch for even a smaller system.
And, use one of the Cat5e or Cat6 cables for the wired network and put a small gigabit switch at the central location.
