12th site exercise at York using the PBI. 28 March 1982 (IM-TD-035)

The site ballast injected was a continuation in a Southerly direction of a previous ballast injection exercise (ref IM TD 27) The site had previously been rail straightened between sleepers 64/37 to 72/0 in November 1981, but no further rail straightening work had been conducted between sleepers 72/0...