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.
60
Tambroni Cabinet ended in 1960.
Pella Cabinet ended in 1954.
Prodi I Cabinet ended in 1998.
Dini Cabinet ended in 1996.
Berlusconi I Cabinet ended in 1995.
Berlusconi II Cabinet ended in 2005.
Rumor II Cabinet ended in 1970.
Rumor V Cabinet ended in 1974.