What you get for under £300
The under-£300 bracket has improved enormously, and the three guitars above are all genuinely good instruments rather than compromises. For this money you get a solid build, tuners that hold pitch, pickups that sound right for their intended style and, after a small setup, an action low enough to play comfortably. The Yamaha Pacifica 112V even gives you a solid alder body and a coil-split humbucker at £269, features that used to cost twice as much. The one thing to remember is that an electric needs an amp, so budget another £80 to £150 for a small practice amp on top of the guitar.
It is also fair to be clear about what you do not get under £300. The pickups are good but not premium (ceramic rather than Alnico on the budget guitars), the hardware is functional rather than fancy, and the factory action usually needs a £25 to £35 setup to reach its best. None of that stops these guitars being excellent value; it simply means the money goes into being a solid, full-featured instrument rather than into refinements a beginner cannot yet use. For a first guitar, that is exactly the right priority.
The best under £300 by need
Choose by the music you play and your exact budget. For the most versatile single buy, the Yamaha Pacifica 112V at around £269 is our overall pick: a solid alder body, the lowest 1.8 mm action on test and a coil-split humbucker that does both bright cleans and rock crunch. For the classic Stratocaster sound on a tighter budget, the Squier Affinity Stratocaster at £199 is the best value, with three single-coils and a light, comfortable body. And for rock and metal, the Ibanez GRG170DX at £179 is the cheapest full-feature guitar we trust, with two humbuckers, 24 frets and a fast neck. All three benefit from a quick setup, which is money well spent on any budget guitar.
When it is worth spending more
Only step above £300 if you can use what the extra money buys. From £450 to £900 you get Alnico pickups, nicer woods, better hardware and a more refined factory setup, as on the Epiphone Les Paul Standard 60s (£469), the Fender Player II Stratocaster (£749) and the PRS SE Custom 24 (£899). An intermediate player will hear the warmer pickups and feel the better setup, and these guitars hold their value better. A complete beginner usually will not yet appreciate the difference, so for a first guitar the under-£300 picks are the rational choice, and you can always upgrade later once you know what you want.