The York looks to be in the colours of Freddy Laker's company Air Charter. That would date the photograph to between 1951-56.
As to the DC3 ??????
Jamie Glass in his book 'The Story of Luton International Airport' states that the three runway lengths in 1951 were (and I've converted them to Feet): 5400, 4950 and 4650. Unfortunately he is no more specific than this.
Last edited by OUAQUKGF Ops; 18th Jul 2019 at 08:41.