I agree Mal,
What makes these Lancaster look Belgian or German is the crosspin location below the barrels. That design makes the action look tall and not so elegant (IMHO).
Moreover, the barrel lump protruding through the action to push the Purdey bolt back is not helping either.
Trunion mounted pivot points make such equipped guns much more attractive (to me). A close second would be the Cordy floating 1/2 pin system.
Best regards,
WC-