Purbeck District Council are currently considering a partial review of the Purbeck Local plan, the outcome of which could have a profound effect on Purbeck for years to come.
The government Planning Inspectorate have indicated that they are not happy with the current plan as it does not cater for enough homes and their view appears to be that over 5,000 new homes are needed in Purbeck over the next 10 years or so.
Whatever your views, you only have until the 12th August to express them.
The section on Dorset for You which deals with the issue can be found here: https://www.dorsetforyou.gov.uk/Purbeck-partial-review
There is a Pan-Purbeck Action Campaign which is opposed to the review and their documents can be found here:

PPAC response page 1 CPRE
PPAC response page 2