 Brunel reported on 25 February 1852 that the contract for the enlargement of the FODR tunnel and the construction of another through Blakeney Hill, was to be let during the month.The final meeting of the FODR Company took place in London on Friday 10 September 1852.In February 1853 the conversion work was going ahead, but the enlargement of the tunnel was proving difficult, especially as the heavy winter coal traffic on the line had to be maintained during the work.