succeeded predecessor successor birth_place leader constituency_mp imagesize party office preceded primeminister birth_date term_start image article_title term_end name
diana maddock office abolished party merged david owen george y mackie paddy ashdown party disbanded john thurso glasgow , scotland , united kingdom paddy ashdown caithness -lrb- from 1966 to 1992 -rrb- , sutherland and easter ross caithness and sutherland 200px -lrb- 2 -rrb- social democratic party -lrb- 1981 -- 1988 -rrb- 1 -lrb- 3 -rrb- liberal democrats -lrb- 1988 -- -rrb- -rrb- labour -lrb- -- 1981 -rrb- -lrb- leader party president of the liberal democrats under-secretary of state , of prices and consumer protection the liberal democrats leader of social democratic charles kennedy office created harold wilson james callaghan 26 june 1936 3 4 march 1974 31 march 1966 march 1988 28 august 1987 1 january 1995 robertmaclennan1987.jpg robert maclennan , baron maclennan of rogart
 16 4 may 1979 7 june 2001 july 1988 16 july 1988 31 december 1998 the lord maclennan of rogart
robert maclennan , baron maclennan of rogart

robert adam ross `` bob '' maclennan , baron maclennan of rogart , pc -lrb- born 26 june 1936 , glasgow -rrb- is a british liberal democrat life peer .
he was the last leader of the social democratic party -lrb- sdp -rrb- , serving during the negotiations that led to its merger with the liberal party in 1988 .
he then became joint interim leader of the new party , known as the social and liberal democrats -lrb- sld -rrb- before later becoming the liberal democrats .
