Tour manager expects Lions to impress on and off the field in New Zealand

• John Spencer: ‘Discipline is one of our core values’• High-profile modern-day Lion could join management rosterNext year’s British and Irish Lions tour party have been warned to behave themselves and be good ambassadors at all times when they travel to New Zealand. The Lions manager, John Spencer, is determined to ensure his squad make a positive impression on and off the pitch and has ruled out the use of underhand tactics to gain a competitive advantage. Related: All Blacks blossoming in time for arrival of Warren Gatland’s Lions | Paul Rees Related: Warren Gatland singles out Dylan Hartl…