There are several review websites that highlight the 'best' routers on the market - for particular purposes/budget - it's worth having a read through those. Here are a couple of examples - There are others;
https://uk.pcmag.com/routers/8151/the-best-wireless-routers
https://www.expertreviews.co.uk/wireless-routers/1413942/best-wireless-routers
Some will be US focused, but most of the considerations will be the same for the UK.
Also see what's on offer on sites like Amazon.
If I were buying a new router today I'd likely look for an AX (WiFi 6) one with the latest technology available (depending on your device's capability) for the future - especially if in a congested area (lots of neighbours around me, big household, many devices).
It's worth looking for a good second hand one - sites like eBay for example can provide some bargains.
Benefits of a mesh system depend on the nature and layout of your property - coverage required. A better solution is to use wireless access points, but that means more wiring and setting up.
It's worth noting that for use with Virgin Media you only need a router with Ethernet WAN port and DHCP - you don't the DSL connection and PPPoE that many routers offer as an alternative since VM don't use that method. Check the features.
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I know a bit about Wi-Fi, Telecoms, and TV as I used to do it for a living but I'm not perfect so don't beat me up... If you make things you make mistakes!