"One provider that does offer FTTH is Hyperoptic (hyperoptic.com). Because it's fibre the whole way, it can offer lickety-split speeds of up to 1Gb with totally unlimited downloads.
The downside is that Hyperoptic isn't available everywhere. It's only found in select buildings, usually apartment blocks, that would particularly benefit from it. This is because of all that pesky disruption it takes to install - it makes more sense to connect an entire building full of residents than just one house."