I'm not sure that there are any guitars that are excluded from playing 'metal', but if I take that to mean roughly Strat-shape, with a pointy headstock, I'd start by looking at the Thomann B-stock offers. 'B-stock' means that someone ordered one, then sent it back, normally, but they are perfectly sound, and carry the same guarantee as others. It's a way of getting a bit off the price. Here's a link to some I'd suggest fall into your criteria (between £200-£300...)...
Thomann 'Bargain' ST-type guitars, with no vibrato, UK prices ...
Feel free to play around with the filters on the left, to see what else is on offer. There's nothing wrong with Tele-style, Les Paul-style, SG-style etc guitars either for metal (maybe avoid archtop though, as a beginner...).
All of these guitars hold their tuning, and can be used in any style, including metal, of course. There are many other suppliers than Thomann, but this is an easy way to see and compare what's on the market, from the comfort of one's own home. Nothing beats trying out various instruments at a music shop, once one has an initial idea of what to try out.
My personal choice would be a Squire Affinity Tele Deluxe (I prefer humbuckers...), like this one ...
Thomann Squire Affinity Deluxe ...
... or this one ...
Thomann Harley Benton Fusion T-HH ...
Spoilt for choice, now, eh..?