Which bin for sanitary products?
Usual answer in the UK
General waste General waste bin
Pads, tampons and applicators go in general waste, wrapped. Never flush them.
Does every council do this?
Most councils follow the answer above, but bins and sorting rules are set locally, and a few councils still do things differently. If your bin has a sticker, or your council sent a leaflet, follow that. Enter your postcode to go straight to your council's guidance.