Invented by your's truely last weekend, so don't copy cat unless you do it right. Don't want to give my expertise a bad name now would you...

Ingredients
50ml Whitley Neill Gin
20ml Bottlegreen Dandelion & Burdock Cordial
(Can now be bought at well-stocked Sainsbury's)

Glass
Cocktail / Martini

Method
Fill jam jar 2/3 with ice.
Add ingredients and stir vigorously 26 times.

Strain into glass.

Good thing you don't get barbequed for this kind of stuff anymore... Would go down well at one though!