(17 Oct 2014, 6:54 pm)Jimmi wrote Extra journeys on service 20 running between Sunderland, Park Lane and Doxford International between Wednesday 26th November and Friday 19th December.
http://durham.pindarcreative.co.uk/tt2/20.pdf
I imagine this will be for the benefit of casual workers employed at Royal Mail's MDEC centre at Doxford Park.
It seems to match the length of the contract.