There are several volunteer organisations who may be able to help out, or which you can join.

The British Trust of Conservation Volunteers

Conservation Volunteers Northern Ireland

Naturenet provides a list of volunteer groups

Also, if you search for “conservation volunteers” on the Internet, a number of local groups come up.

You can also contact the Environment Agency, or one of the national countryside agencies, who may be able to put you in touch with others. Their contact details are on the Links page.