Hmmm... Christchurch huh? Hasn't made it to north Island that I know of. But my son and partner are entering the Nationals next year, so a family trip is being planned and Christchurch will be part of that... thanks TL...

And as for TimTams (or ChitChats) ... the only way to have them is with a glass of cold milk or hot chocolate (some people I know use a hot cup of tea or coffee)
Bite two corners off, diagonally opposite from each other, then use like a straw to suck the drink through (one bitten corner in drink, other bitten corner in your mouth)... then pop the whole biscuit/cookie in your mouth and let it melt onto your tongue... mmm, sensuously divine...
As shallow as it sounds, eating a TimTam or ChitChat like this has to be on your list of things to do before you die.