Something like this should do the trick Barry. Most of the designs out there are just fine for the job, I've fitted similar for myself and for both of my daughters' tvs. It goes without saying that the important thing is having it strongly fixed to the wall. Unless you need to be able to swing the tv round sideways, I'd avoid those with the 'arm' - just more complicated and quite bulky.

Don't bother with the supplied 'bubble' levels, they're pants. Best to use your own.

https://www.amazon.co.uk/Perlegear-T...%2C137&sr=8-14

The trailing wires do my head in a bit, but you can buy plastic trunking from B&Q quite cheaply. Just sticks to the wall with double-sided tape (included).

Like this:

https://www.diy.com/departments/d-li...6644391_BQ.prd