There is a wealth of medal roll material available on line, much of it FREE. Ancestry has an impressive collection of medal rolls between the years 1793 and 1949 BUT excluding medal rolls for the First World War and Second World War. You can search the UK Military Campaign Medal and Award Rolls 1793-1949 but you'll need to pay for the privilege. What you get in return is film of the rolls and transcriptions; still well worth the investment in my book.
Specialist auctioneer and valuer Dix Noonan Webb have four medal rolls on their site. All are free to search, but it's imporatnt to note that this is a searchable facility and not a browsable one. The medal rolls are:
Military General Service Medal Roll (1793-1814)
Naval General Service Medal Roll 1793-1840
Army of India Medal Roll 1799-1826
India Mutiny Medal Roll - British Forces - 1857-1859
The first three rolls on this list were compiled by Colin Message, the India Mutiny roll by Kevin Asplin.
Kevin has his own, extremely useful, Asplin Military History Resources website and within this you can access the following medal rolls:
Nominal Roll for the Indian Mutiny medal 1857-1859 - a browsable roll but without medal clasp details.
Medal Rolls for the British Army's campaign in Burma 1887-1889.
Indian General Service Medal 1895-1902 - medals (and clasps) for the Punjab Frontier Campaign of 1897-98 which were awarded to the 2nd Battalion Highland Light Infantry, 2nd Battalion Argyll and Sutherland Highlanders, and the 3rd Battalion Rifle Brigade.
Long Service & Good Conduct Medal awarded to members of the Royal Artillery between 1902 and 1912.
In addition there is a sample from the full QSA and KSA medal rolls to the Lancashire Fusiliers and details on how to order transcriptions of medal rolls for the China campaign of 1856-1860.