Yes to clarify this is explicitly the percentage before being sent to "reprocessors", however here is a breakdown of Bristol council: https://www.bristol.gov.uk/residents/bins-and-recycling/what...

It's a shame that they do not link to the direct companies so you can trace the waste to completion but it looks like a good deal of it is not getting shipped outside of the UK.

I believe there are a couple of bills being proposed to also stop this practice completely, although I don't know how effective they will be.