Mikes 'Y' Sour Strawberry

Just cracked open a bottle of Mike's latest 'Y' beer - Sour Strawberry. It's really nice, damn refreshing on a summer afternoon.

The Mike's website it strangely silent on it (and all of the 'X' and 'Y' beers), so does anyone know what it is? I'm assuming that it's using either Lacto or Brett and fruit on top of a light base.