There have been countless posts here, over the years, about choosing TV sets. Lots of people have brands that by swear by (or, occasionally, swear at) but there seems to be no universally popular first choice. My own opinion is that, unless you're looking for the absolutely finest quality picture (where you'd need scientific measuring devices to discern the difference from similar rival brands), almost any of the big names, and quite a few of the lesser-known ones too, are perfectly adequate for most people's needs.
One thing that is widely agreed upon here though is that Richer Sounds is a first rate company, with excellent products and service, as well as highly competitive pricing.
For a telly in a spare room (unless you live in a baronial hall, with massive spare rooms!), and where only one person will be watching most of the time, a 24" screen should be perfectly adequate. One little extra that you might want to see in the set though, is 'smart' capability, meaning that Mr Smurf can watch footy on iPlayer, etc, as well as on live TV.
With those factors in mind, I'd be looking at this, from LG:
https://www.richersounds.com/tv-projectors/all-tvs/lg-24tn520s.html
If Mr Smurf would prefer a larger (28") screen, although I don't think that it's really necessary, I'd opt for this, from the same manufacturer:
https://www.richersounds.com/tv-projectors/all-tvs/lg-28tn515v.html
Neither of those sets is 'HD' though. (They're both 'HD ready, which means that they can display an HD signal from an external device, such as a Blu-Ray player, but there's only an SD Freeview tuner built into the set). If Mr Smurf wants to watch his footy in HD, this 32" smart TV, from Toshiba, is an absolutely cracking bargain:
https://www.richersounds.com/tv-projectors/all-tvs/toshiba-32ll3c63db.html