The sheer amount of litter in the local park, along the river and canal. Can't blame tourists, its mostly locals and from what I've seen first hand kids and teenagers..its not a lack of bins, there's plenty near and along the river, park.
People just don't seem to care. Even went litter picking with our Mtb group along the canal at the weekend, went along there today its like we hadn't even been after only 2 days