Volunteering

Volunteering to help the countryside

http://www.cprepeakandsyorks.org.uk/involved/volunteer.htm

Volunteering  with the Peak District National Park (18 only)

http://www.wildaboutbritain.co.uk/newspaper/wildlife-conservation-magazine/midlands/peak-district-world-of-workers 

Volunteering

http://www.connexions-direct.com/index.cfm?pid=133&catalogueContentID=169

BTCV
British Trust for Conservation Volunteers offers a number of opportunities in all kinds of areas including restoration work on natural landscapes, footpath building etc.
Visit their website at www.btcv.org.uk where you can find your local contact in the Contact Us section.