Pimm's heated?

[John Costello]

Someone[1] mentioned a pub serving Pimm's heated, in regards to one of the 
December meetings I believe.  Could you elaborate on what goes into a 
heated Pimm's (not lemon-lime spritzer, but probably a slice of lemon)?  
Guests are arriving in a couple of days and I want to offer them warm 
drinks that they have not tried.

Many thanks,

John
[1] I think it was Simon Wistow, but I could be wrong.

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John Costello - cos at indeterminate dot net
"You cannot propel yourself forward by patting yourself on the back."--Unknown