ARE YOU CONFIDENT YOUR WILL IS 'IRON-CAST'?
Don't get caught out by using a DIY Will Kit that is unlikely to capture all of the unique requirements for your personal situation.
Talk to a professional who has the experience and knowledge to assist you in ensuring you have considered all of the relevant and appropriate arrangements for you and your family whilst minimising tax and other cost considerations.
This particular article talks about the considerations for parents in a blended family.