Regarding the bridge itself. It was built by the M&GN Railway company, and the maintenance of the bridge which I believe was a swing bridge was carried out by the LNER and subsequently the Eastern Region of British Railways Lincoln and finally Doncaster divisions. The direct responsibility for the maintenance was vested in the workshop staff at Boston, and callouts were rare, once or twice in the 4 years I worked there. However, in the early 1970s there was consternation at Doncaster accounts office when a bill was received from the then Holland County Council (Highways Dept) for work carried out on the bridge. After some 10 years, and two major re-organizations on the railway our responsibility for the bridge had been forgotten, and I was the only person still involved who remembered it. All others who might have known had moved on in the organization, I was the only one whose promotions had all been local.Sorry for the digression, but hope this might be of interest.