Thanks for your enquiry.
As your mother was alive when your grandmother died, she was legally entitled to receive the legacy of £7000 and there are no grounds on which you can dispute this.
Likewise, if your stepfather has now in effect received these monies from your mother, then you have no legal right to challenge this.
I am sorry this is not the answer you were looking for, but it sets out the legal position.
Please feel free to reply if you need any further clarification.
Thanks for your reply.
Despite what you say, it is very hard to challenge a Will, and indeed your grandmother herself would have had to instruct a Solicitor if she wanted to update her Will and this is not something your mother would have been able to do without your grandmother agreeing. Likewise, us Solicitors have to make sure that whenever we take instructions for a Will that our client (your grandmother) appears perfectly of sound mind to make a Will and is not being pressurised by a third party to sign it.
This is because we do not want to be left open to someone challenging the validity of the Will as the only grounds where a challenge would be successful is where the person making the Will was not of sound mind or where undue influence was being used to get that person to change her Will. Even if undue influence was the reason why your grandmother changed her Will, without any cast iron evidence of this, you would not be successful.
On a side point- Even if you had made a challenge, you are more than likely going to have had to spend at least £5,000 in legal fees.
I am sorry I haven't told you what you were hoping to hear.
You may have missed out but you haven't lost. What goes around comes around in life, so he will be the loser in the long term.
All the Best.