On 3 December 1915 the first trials of Mother took place in Lincoln and, according to Stern, were “very successful”.
One of the tests that had been ordered by d’Eyncourt was the firing of the 6 pounder gun to see what effect it would have on the crew and the sponson. When Maj Hetherington attempted to fire the gun it misfired. The gun was elevated so that the cause of the misfire could be investigated when it went off, sending the shell in the direction of the Cathedral which was only about a mile away.
After two hours of searching however the shell was found, safely buried in a field. The conclusion reached by all was that a bigger test facility would be needed.
Picture courtesy of Richard Pullen