The London and North Eastern Railway (LNER) Class B1 4-6-0, designed by LNER’s chief mechanical engineer, Edward Thompson, was a mixed traffic 4-6-0 used for general passenger and freight duties. Introduced in 1942, 274 were built by LNER and 136 by British Railways after nationalization in 1948. These locomotives operated throughout the LNER system in England, Scotland, and even on the Southern Region.

Two B1s are in preservation now, No. 61264 and No. 61306. The North British Locomotive Company built No. 61264, which began as LNER No. 1264 until British Railways took ownership in 1948. The only LNER locomotive to survive in Barry scrapyard, it was rescued in 1973 and has been restored to mainline traffic by the Thompson B1 Locomotive Trust.

No. 61306, built in 1948, was delivered after nationalization to British Railways. In preservation, it was painted LNER apple green livery and given the number 1306, which would have been its LNER allocated number had LNER not been nationalized, and the name Mayflower, taken from a scrapped BR built Thompson B1. In the summer of 2019, the preserved Mayflower became the first regular steam operated service to run from London Waterloo terminal in 52 years.

Specifications
- 1:32 Scale / 45 mm Gauge
- Brass & Stainless Steel Construction
- 6 1/2 ft. (2 M) Mini. Radius
- 23.43 x 3.54 x 4.92 in. (595 x 90 x 125 mm)
- 10.14 lbs (4.6 kg)
Features
- Alcohol fired
- ‘C’ type water capacity 210 cc at 80% off
- Walschaerts valve gear
- 2 cylinders with piston valves
- Roscoe displacement lubricator
- 3 tubes alcohol burner with superheater
- 2 safety valves
- Regulator valve
- Blower valve
- Reverse handle
- By-pass valve
- Pressure gauge
- Water level gauge
- Blow-down valve
- Hand water pump in tender
- Removable alcohol tank capacity 240 cc
- Axle water pump
Models
- AST-109-1K LNER Green “Mayflower” #1306, KIT
- AST-109-1KU LNER Green “Mayflower” Unnumbered, KIT
- AST-109-2K LNER Black #1264, KIT
- AST-109-2KU LNER Black Unnumbered, KIT
- AST-109-3K BR Black #61264, KIT
- AST-109-3KU BR Black Unnumbered, KIT
- AST-109-4K BR Green “Mayflower” #61306, KIT
- AST-109-4KU BR Green “Mayflower” Unnumbered, KIT
- AST-109-1R LNER Green “Mayflower” #1306 (In Preservation), RTR
- AST-109-1RU LNER Green “Mayflower” Unnumbered, RTR
- AST-109-2R LNER Black #1264, RTR
- AST-109-2RU LNER Black Unnumbered, RTR
- AST-109-3R BR Black #61264, RTR
- AST-109-3RU BR Black Unnumbered, RTR
- AST-109-4R BR Green “Mayflower” #61306 (In Preservation), RTR