It's bircher muesli and with walnuts, and IMHO is delicious (though I'm not sure how good for my diet the nuts are).It isn't porridge, off the top of my head I can't remember as someone told me once..
First thing I noticed on Monday - first WP flight ex BNE, - shot glasses with bircher muesli. A definite step-up on the serve yourself options, though I think the BNE Business lounge was more crowded than the QP next door.