Question:
Which position did Hamish Gray, Baron Gray of Contin hold in Jan, 1979?

Context:
 Hamish Gray, Baron Gray of Contin holds the position of Member of the 46th Parliament of the United Kingdom from Feb, 1974 to Sep, 1974. 
 Hamish Gray, Baron Gray of Contin holds the position of Member of the 47th Parliament of the United Kingdom from Oct, 1974 to Apr, 1979. 
 Hamish Gray, Baron Gray of Contin holds the position of Member of the 48th Parliament of the United Kingdom from May, 1979 to May, 1983. 
 Hamish Gray, Baron Gray of Contin holds the position of Member of the House of Lords from Jul, 1983 to Mar, 2006. 
 Hamish Gray, Baron Gray of Contin holds the position of Member of the 45th Parliament of the United Kingdom from Jun, 1970 to Feb, 1974.

Answer:
Member of the 47th Parliament of the United Kingdom