I don't know if they're available in the UK, but here I can get heat-resistant silicone spatulas. They simply don't melt. It seems like they tend to use the term "spatula" for scraping-type spatulas and "turner" for what you're talking about. I have a Kitchenaid one that works pretty well. The only drawback is that it's a little thicker than a nylon one and a little more flexible. I've not had any real problems flipping things, though. Well, no more so than my general flipping incompetence.