It was felt to be critical that this expedition should be successful as the French had permission to mount an expedition in 1954 and the Swiss in 1955 .
That the British would not have another opportunity until 1956 at the earliest .
It was felt to be critical that this expedition should be successful as the French had permission to mount an expedition in 1954 and the Swiss in 1955 , meaning that the British would not have another opportunity until 1956 at the earliest .