George Heiron was a superb railway photographer and artist and many of his paintings have been used by jigsaw manufacturers. Several previous posts have covered jigsaws replicating his artwork and this one, 29th May 2013, comprises two more.
The first picture shows a wooden Victory puzzle of 100 pieces titled Lemberg. George's painting depicts a London & North Eastern Railway (LNER) express of teak coaches headed by a Gresley class 'A3' 4-6-2 locomotive, No.2544 Lemberg. The Kings Cross - Newcastle express is pictured at Potters Bar in 1930. 
The second picture shows another wooden Victory puzzle of 100 pieces, in the same series of four, as Lemberg above. This jigsaw is titled Union Castle. The Bulleid 'Merchant Navy' class 4-6-2 No.21C2 Union Castle is pictured heading the 'Devon Belle' Pullman train. The 'Devon Belle' was a Southern Railway (SR) service that ran between 1947 and 1954 from Waterloo to Ilfracombe and Plymouth. A special feature of the train was the observation car attached as the final coach.