Edward Borrows and Sons

The company's business included iron and brass founding and repairs to small locomotive engines.

[3] The company first started building railway locomotives in 1872, specializing in a single small 0-4-0WT well tank design, which it sold primarily to Brunner Mond, Pilkington Brothers, and United Alkali Company.

The discrepancy may be explained by the missing numbers having been allocated to some steam rollers, or other general machinery, which are known to have been built.

[1] The final builds were three between 1913 and 1921, begun at the original Providence Works but completed at other sites nearby.

As the firebox and well tank gave no room for conventional inside motion, the valvegear was instead placed between the wheels and the outside of the frames.

This required the wheels to be overhung outside their bearing further than was usual, but this was not a problem on a light locomotive.

Because the slide valves were mounted outside of the frames, the smokebox curved outwards at the bottom to contain the steam pipes.

Frames of Windle , 2016. The riveted well tank can just be seen, as can the guide for the valve spindle, fixed unusually to the outside of the frames.
Willy the Well Tank at the Avon Valley Railway in 2013