I've created a spreadsheet detailing where i buy all my plastic free purchases here: Plastic free purchases in London 2018
So we used to export a lot of our plastic waste to China but now they have shut the door. In the short term we need to either find another place to export to that will recycle. In the long term we need to create plastic recycling plants here in the UK so we no longer need to export our plastic waste. We should not incinerate our plastic waste or put it in landfill here in the UK or send it abroad anywhere if the recieving country can only incinerate or landfill either. See BBC report here about China no longer accepting foreign waste: http://www.bbc.co.uk/news/business-42455378