Shadow Cabinet of Michael Foot ended in 1983.
Shadow Cabinet of John Smith ended in 1994.
Shadow Cabinet of James Callaghan ended in 1980.
140*10/6 = 233.33... ft or 233 ft 4 inches. Except at that distance, the end of the shadow would be too diffuse to measure accurately.
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Berlusconi I Cabinet ended in 1995.
Prodi I Cabinet ended in 1998.
Tambroni Cabinet ended in 1960.
Dini Cabinet ended in 1996.
Pella Cabinet ended in 1954.
Berlusconi III Cabinet ended in 2006.
Moro III Cabinet ended in 1968.
Prodi II Cabinet ended in 2008.