Litter Picking and Public Litter Bins

Under the Freedom of Information act, please provide me with the following details:

The amount spent by the local authority on litter picking.
The number of staff employed to pick litter.
The number of public litter bins in the local authority area.

The time range I am interested in is for each of the three years 2015, 2016, 2017.

Devon County Council is not responsible for litter picking and does not hold the information requested.  Litter is the responsibility of District and Unitary Councils in Devon.  Please contact them directly using the information on the link provided.