Police were today preparing to mount a major anti-hooligan operation around Leeds United's match against Millwall.
Games between the two sides have in the past been marred by disorder involving rival supporters.
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But West Yorkshire Police have plans in place to try to ensure Saturday's Championship fixture at United's Elland Road ground passes off peacefully.
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One key part of their stratregy has seen travelling fans being issued with vouchers rather than match tickets.
The vouchers can only be exchanged for tickets at Woolley Edge service station on the M1 near Wakefield for a set period before the fixture's 12.30pm kick-off.
It is understood that police officers will be keeping watch at Woolley Edge for any known hooligans who have made the journey north.
Chief Supt Mark Milsom, match commander for the policing operation, said today: "We aim to ensure the game is safe and enjoyable for all supporters.
"We will look to intervene early in any issues so that they can be dealt with positively."
The worst recent violence at a Leeds versus Millwall fixture came in October 2007, when police repeatedly clashed with yob fans outside Elland Road and travelling hooligans caused thousands of pounds worth of damage to buses.