No, you do not need a new Will. If you are happy that your current Will still reflects your wishes and you simply wish to make some additions or small changes then your Solicitor can help create a Codicil. A Codicil lists minor changes or extra gifts to your original Will.

It is however a good idea to regularly review your Will in order to make sure it reflects any changes in your circumstances (e.g. marriage, a new house or children and grand-children)