Based upon these eBay auctions I am going to say it is worth less than $5US or less than INR 250.
http://answers.yahoo.com/question/index?qid=20090510054...
The best known low value coin is the "Farthing" (fourthing), one quarter of penny. Great Britain also produced "Half-Farthings", "Third-Farthings" and "Quarter-Farthings", mostly for circulation in th...
http://wiki.answers.com/Q/What_is_a_former_British_coin...
A British 2002 Five Pound (Crown) coin (QEII Golden Jubilee Commemorative), uncirculated and in absolute mint condition could fetch up to £7 GBP. A British 2002 Five Pound (Crown) coin (QEII Golden Jubilee Commemorative)(specimen in present...
http://wiki.answers.com/Q/How+much+is+the+2002+golden+j...
A British 1989 Two Pound coin (300th Anniv of the Bill of Rights), uncirculated and in absolute mint condition could fetch up to £4 GBP. A British 1989 Two Pound coin (300th Anniv of the Bill of Rights)(Specimen in presentation folder), unc...
http://wiki.answers.com/Q/What_is_the_value_of_1989_Bri...
A British 1990 Five Pound (cupro-nickel) coin (Queen Mother 90th Birthday Commemorative), uncirculated and in absolute mint condition could fetch up to £8 GBP. A British 1990 Five Pound (cupro-nickel) coin (Queen Mother 90th Birthday Commem...
http://wiki.answers.com/Q/What_is_the_value_of_1990_Bri...
A British 1984 One Pound (nickel brass) coin (Scottish design), uncirculated and in absolute mint condition could fetch up to £5 GBP. A British 1984 One Pound (nickel brass) coin (Scottish design) (specimen in presentation folder), in absol...
http://wiki.answers.com/Q/What_is_the_value_of_a_1984_B...
A British 1985 One Pound (nickel brass) coin ("PLEIDIOL, WYF I'M GWLAD" around edge), uncirculated and in absolute mint condition could fetch up to £4 GBP. A British 1985 One Pound coin (nickel brass) (specimen in folder), uncircu...
http://wiki.answers.com/Q/Value+of+1985+1+pound+coin