Trolley Team

What words can be said about two Persons Of Interest who find themselves united under the title of "Trolley Team"? Whatever they may be, Joe Radford felt sure I knew them. For all I know for sure, is there was once I time, a day even, when Sophie Bolwell-Davies and perhaps even a trolley found themselves in the company of a Will Stirk. The 3 were not available for questioning at the time of writing.