Litter in the UK

Some parts of the UK appear to have a problem with litter on the roadside verges. In our area this is only collected once every 6 months, so bad areas can look awful after a few months. There are several initiatives to help co-ordinate local "self-help" groups where volunteers go out in groups to tidy up particularly bad patches. See http://www.thebigtidyup.org/default.aspx . I'm hoping to get involved in East Cambridgeshire where I'm sure a few of us can make a difference.