Studies in vitro showed that STn expression endowed bladder cancer cells with high invasion capability [5 ] and an immunotolerogenic phenotype, potentially favoring disease dissemination [6 ].

Built by Bombardier, the 44 Class 221 Super Voyagers have tilting mechanisms and were delivered in a mixture of four-car and five-car versions. The remainder were the non-tilting four-car Class 220s.

'We'll get the green army to keep an eye on the place, make sure there's not too much activity while our backs are turned,' said the ops officer.

For depreservation, the engine is turned manually, causing the compound to revert to liquid form, and it is drained through depreservation valves on the lower cylinders of the engine.