It would seem reasonable to deem, that given that this is a daily flight, that a 27 hour delay is equivalent to cancellation, for which BA are liable to give compensation of €600, a liability they accede to: https://www.britishairways.com/trave...club/_gf/en_gb Indeed,a ssuming this was the flight of 13th January, it does appear to have been cancelled in fact: http://uk.flightaware.com/live/flight/BAW192

Further, under EU rules, it's quite likely that BA would pay up on the basis of a claim for delay anyway, irrespective of whether this constitutes 'cancellation', although their page above doesn't confirm that they will do so.

So, put your claim in, '€600 please BA'.