mainline is still and impressive one! Even though the sound is not quite the same as when the Paxman Valenta 12RP200L engines were fitted with their screaming turbo chargers! At Langford just south of Biggleswade 43311 leads with 43299 on the rear working the 07.34 Harrogate to London King's Cross. 43299 was the last of the first batch delivered to the Eastern Region in 1979 as 43099 that was part of set 254022.