What can I recycle?

I’d love a way to identify what I can recycle. Here in the Department for Environment, Food & Rural Affairs (Defra), we’ve done some work using convolutional neural networks to identify objects using smartphones. If you could offer something that will tell me if I can recycle it or not, I’d find it useful. At very least, a page on croydon.gov.uk that states which plastics I can recycle would be useful (I couldn’t find it). Here’s the kind of thing I’m talking about https://www.greenlivingtips.com/articles/recycling-by-the-numbers.html