The Rebecca is referenced in two Alarm songs, Newtown Jericho and Ghosts of Rebecca.

They are part of Welsh history and maybe were referenced as a result of Mike rediscovering his home country of Wales as he traveled the country during the writing and recording of Eye of the Hurricane.

Ghosts of Rebecca – Video Link

Wiki Entry
The Rebecca Riots took place between 1839 and 1843 in West and Mid Wales. They were a series of protests undertaken by local farmers and agricultural workers in response to perceived unfair taxation. The rioters, often men dressed as women, took their actions against toll-gates, as they were tangible representations of high taxes and tolls. The riots ceased prior to 1844 due to several factors, including increased troop levels, a desire by the protesters to avoid violence and the appearance of criminal groups using the guise of the biblical character Rebecca for their own purposes. In 1844 a Parliamentary act to consolidate and amend the laws relating to turnpike trusts in Wales was passed.
Full Wikipedia entry on the Rebecca Riots