I've been quoted 3900 & 4700 so far (assuming full tiling, there is reduction for partial tiling) for the labour. Just 7x7 ft bathroom with bath+sink+toilet, nothing extraordinary included. Their cost do include plumbing supplies and extractor fan, LED lights. I only have to supply obvious bathroom units and tiles.
It's much easier to find on the internet about how people manage to do X for very little. I guess no one wants to sound like a mug for paying considerably more than amazing cheap stories on internet.
So, are the quotes normal for London? Or have I been looking at bathroom fitting companies instead of smaller tradesmen? As long as no one is paid minimum wages or less!