P&O Ferries, which sails daily between Britain and France, on Thursday axed 800 UK crew with immediate effect and suspended services in a bid to stay afloat, sparking protests from angry staff and trade union fury. The Dubai-owned group announced it has shed more than one quarter of its staff in a drastic restructuring to save cash, and halted services for the next few days. “We are providing 800 seafarers with immediate severance notices,” the company owned by DP World said in a bombshell statement. P&O — which is based in the southern English port of Dover and operates four routes serving B…