4S-010-018 Class A1 Terrier 0-6-0T KESR Blue 'Rolvenden' Steam LocomotiveExpected Delivery Q3 2026 (Subject to Change at Manufacturer's Discretion). EXCLUSIVE TO RAILS OF SHEFFIELD Returning after a number of years, our popular LBSCR Class A1 & A1X Terriers have been upgraded with a number of enhancements to the original release, and are now available to pre order. More formally known as the London, Brighton & South Coast Railway A1 Class, this locomotive became affectionately known as the Terrier due to the distinct bark