Think a will is a will and should be honoured, and the beneficiaries have an almost perfect legal case to enforce it.
As far as I know the only dispute that can be effective is where skulduggery (lovely word) is suspected, i.e. the family solicitor who, strangely is also the main beneficiary. Not the case in this dispute, think the deceased chose the charities almost at random, not enough information to really know for sure.
hi, hope your steroid injection(cortisone?) works, not many other treatments that seem to work. As an Acupuncturist (retired) I have treated it, not 100% success rate, but sometimes with complete disappearance of the neuroma, so might be worth a try.
If you can find a MBAcC practitioner near you then they may be able to help at not too great expense. The technique I used was 2 needles either side of the neuroma, palpation skills are required, but it should be easily located, along the channel lines (between 3rd & 4th toe is not a recognised channel, but just needle parallel to Liver channel, i.e. between the matatarsels). The needles are then connected to a TENS machine and a fluctuating current passed between them, normally at just below the pain threshold, so that it feels uncomfortable but not unbearable, and then left for as long as possible (at least 1/2 an hour)
If its going to work, you should feel the benefit within 24 hours, if not, then perhaps another session, but I don't feel that repeated treatments will work any better than the 1st, so avoid being booked in for lots of treatments, especially if they require advance payment (there're are lots of unscrupulous "acupuncturists" out there, hence look for MBAcC, there're ok)
Hope that may help, good luck.