The National Trust has a comprehensive list of conservation holidays throughout the UK. All these holidays can be found on the Internet with specific information describing what each holiday entails. The holidays can fall into different categories; working in the countryside; working in public gardens or adventure holidays.
Most of the holidays involve some hard work to improve the countryside. They are a great way of meeting new people and cost very little with food all in the price. When you are looking at the different holidays take note of the accommodation as this can vary from very basic conditions with little amenities to good quality services.
You will need to have an adventurous, versatile spirit with an enjoyment of meeting new people. There are categories of holidays for different age ranges from young to old. Most of the holidays range from a 3-day break to a full week. One day out of the week is used to do something different like go for a walk or visit a place of interest.
The conservation tasks include dry-stone walling, constructing pathways and pruning trees and bushes. On an evening you can share a drink, have a game of cards, go for a walk and get to know each other better.
If you are thinking on going on one of these holidays I would definitely recommend it and I hope you have a fantastic time.