5 siblings inherit a house. Sibling A wants to buy it. Siblings B, C and D agree to sell it to them at 60% of the market value 'to minimise the tax burden'. Sibling E isn't consulted at all, just told that this is what's happening. Sibling E's solicitor says it doesn't have to be a unanimous decision. The executor is happy to go along with it all for a quiet life.
Is there any course of action available to Sibling E that will make a difference?