Wording of will in reference to stocik and shares

[Guest]

A relative recently passed away and has left me as listed "all stocks and shares listed on the London stock exchange". I know that the relative thought that meant all shares & funds they owned under the Natwest banner. Unfortunately probate (NatWest) have told me I'm due a small proportion and only the funds listed on LSE with (I presume) the rest of the money, which is 90% of it, going to charity. The executors and all relatives know this money was meant to be left to me but what can I do? Some of the funds are government bonds in America / Asia etc but all under the Natwest account. I would of thought the solicitor who completed her last will would of made this clear but evidently not?
*

[des8]

Not all is lost!
Under the Administration of Justice Act 1982 application can be made to rectify a will.
A Will can be rectified if the court is satisfied that there was* mistake* a failure to understand the instructions of the testator by the person who drafted the Will.
*The application must be made within six months of probate being granted.

If rectification is not possible a claim against the solicitor for professional negligence might be possible.