Speculation that Crosby might gatecrash the Abbey bid looks optimistic as an HBOS assault would be likely to fall foul of competition authorities even though its share of new mortgage loans has dropped to 17% from 23%. Other possible bidders for Abbey, up 5 1/2p to 572 1/2p, include Citigroup and Lloyds TSB. Santander fell 5.28p to 522p.