Unfortunately the seats in intra-European business class aren't antiquated - even new ones (e.g. on other airlines) are nearly always the same as Y seats, just with the seat next to you unoccupied. BA is unusual in having "converter" seats on most short-haul flights (except UK domestics) which adjust to give an extra 5cm or so of seat width in Club Europe (business class) configuration. But still nothing like US domestic First.