Hello Julie,
There is a one line entry in the Titanic Relief Fund Mansion House booklet of March 1913 under: Cases in the London Area: Passenger Claim No 88. It reads Sharpe, dependant, Mother. Payment 35 pounds.
While other 1912 documentation has Sharp, I note that the Contract Ticket List also has the spelling Sharpe, so it may be that that was the correct spelling.