I've been checking out the Trusts shopping link and because it seems a good idea here is some information to help you look for yourself.
Shopping over the internet is growing in popularity and if you wish to let the Trust benefit all you need to do is to start from the Trusts web page as shown below.
Click here to go to their web site. http://www.somersetwildlife.org/
Many of the big names can be accessed from this web site. By using this link from the Trusts web site the retailer automatically registers your purchase and makes a small contribution to the Trust. If all internet shoppers in Somerset used this device it would add hundreds of pounds to the Trusts finances. Look for the "Buy At" link.
Help raise funds for our vital conservation work by shopping on the internet.
Click here to visit 'Buy At', where you can purchase gifts from retailers including Marks and Spencer, John Lewis and Amazon and earn the Trust commission at the same time. And don't leave without visiting our shop where you can 'Adopt a Dormouse'
http://www.buy.at/somersetwildlife