Bubble Jam, Chinatown, London
A new bubble tea place (same owners as Candy Cafe) on the Shaftesbury side of Chinatown. The honey peach bubble tea was basic, using standard fruit mixes rather than real fruit, but the tapioca pearls were excellent -- a perfect soft chewy consistency, yielding easily bouncing back only in the final part of a bite. Also an intriguing flavour in the pearls themselves -- a dark palm-sugar like sweetness. Pricey at £3.60 each, but not that many options in London (love to hear of other places!).
I'm pretty sure Cafe TPT, HK Diner, and Leong's Legends all sell bubble tea for £3.30. I prefer HK Diner's version, but sometimes they're reluctant about letting you sit there without ordering any food. Think Leong's Legends version was not very good - tapioca pearls were flavourless and too chewy.
£3.60 is quite expensive, if you add service charge as well!