Rev. Mr. Fremantle is, I think, William Robert Fremantle, second son of Sir Thomas Fremantle. The reporter introduces him as "of the new church built here by the company" but I think this may be a reporter error. The incumbent was, and had been from the beginning, George Weight, acknowledged in a later speech. This Fremantle may have been a curate, but I can't think that he would be the one saying grace at such an important occasion while George Weight remained in the shadows. There were two Fremantles of this period who had church careers. W R Fremantle, mentioned above, and his nephew, William Henry Fremantle, who was not ordained until 1855. This leaves us with one candidate. William Robert Fremantle was a senior divine in the C of E and a respected writer and editor on theological subjects. He was probably present at the request of the directors to represent the Buckinghamshire interest. He easily outranked poor old George Weight who was merely Vicar of St. George's. Weight is acknowledged in Glyn's remarks but was clearly not important enough to sit at the top table.
William Lucy was Lord Mayor of Birmingham from 1849-50.
about the history of Leighton Buzzard and Linslade.
Here follows The Times reporting of the speeches.
Mrs. Leonora Hibbert was the manager of the Refreshment Rooms, and from all accounts a formidable organizer. Catering for 1,500 people, especially in those times, must have been an enormous undertaking, and necessitated the hiring of a large number of temporary staff. Note that 14,000 cups and saucers had been prepared, according to the reporter. There would have been no time for washing up until after the event. I have written a brief life of Leonora Hibbert here.