Hi Littlesue73, welcome back to the community! Thank you for posting to enquire about which sockets are needed for your service.
You are completely correct that the router will need to be connected via the main socket in your front room.
If you wanted to have this relocated within the home, this is possible! However there is a £25 Technician call out charge for it to be relocated.
We have several different TV box services which are currently available, and may affect how you would choose to proceed when assessing where your sockets would be best placed. For best performance the primary TV box should have a wired connection, however some of our newer boxes (Particularly the TV 360 mini boxes) can operate from a Wi-Fi connection, and so would not require an additional socket. You can see more about TV360 here.
The TV 360 mini boxes operate by communicating with the Primary TV 360 box which holds all of the recordings.
Do you know which TV service you will be taking with us, and which boxes you will be using? (V6 or TV360)
Do you currently have a manned installation booked? (This is where an engineer attends to install your services.)
If you do, the technician who attends the installation will be able to help optimise the performance of the equipment in your home, also taking into consideration its location.
All the best.