The cost of writing a Will varies depending on how complicated it is. You can ask several solicitors what they charge before making your decision.
If you have already written a Will and wish simply to update it with a gift to charity, there should be no charge, but you should check this with your solicitor.
Free Will Month takes place every March and is an opportunity for people aged 55 and over to have their simple Wills written or updated by participating solicitors across the UK. Whilst Reverse Rett are not one of the listed charities, participating solicitors will still offer this opportunity to those wishing to leave a gift to Reverse Rett. Please visit www.freewillsmonth.org.uk for further information.