Olson database name ambiguity

Hi Apologies for cross posting this. I think that this is a problem in the data in the Olson database, but as it is a binary format it is difficult to verify this. I have come across this problem using the DateTime perl module (version 0.28) whose data is generated from the Olson database. The problem that I am experiencing is that the short name for timezones for 'Europe/London' up until 1996 were either 'GMT' or 'BST' (depending if daylight saving changes were in effect). From 1996 the name for the timezone is the rather less precise 'GMT/BST' regardless of whether daylight saving changes are in effect or not. I have attached a script that demonstrates this, and its output. Regards, Tom