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South Wales Police will implement the biggest security operation Wales has ever seen for a sports event.

Some 7,000 England fans have tickets, but any in England shirts trying to get into Wales sections of the ground have been warned they will be turned away.

Supporters have been told to arrive early on the day due to extra security.

A sell-out crowd of 72,000 will see Wales play their first home match against England since 1984.

Paul Sergeant, chief executive of the Millennium Stadium, said strict segregation would be enforced.

He added: "They (England fans) buy tickets through their travel club and that's very tightly controlled by the English FA.

"If people turn up wearing their England shirts in the wrong section of the ground, they won't be allowed in."

Extra staff are being laid on at pubs and restaurants across the city centre.

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Big screens are also being erected, and field hospitals are being set up in and outside the stadium in case some people suffer minor injuries during the day.

South East Wales regional ambulance officer George Murphy said: "The treatment centres will relieve the pressures felt by both the ambulance service and the local A&E departments."

Ed Townsend, from business group the Cardiff Initiative, said it was "another big day" for the city.

"I don't think we anticipate trouble, what we do is prepare the city," he said.

"I think the city is working hard at making sure it does all possibly can to make it a good day for everybody who comes."

A tented village, which can cater for up to 7,000 England fans, is being set up at Coopers' Field near the castle.

The Football Association is funding the 'englandfans Village' following discussions with Cardiff Council, the Football Supporters' Federation and South Wales Police.

MATCHDAY INFO City centre road closures from 1300-1745 BST Park and rides operating, sign-posted from M4 Jct 29, shuttle buses from 0830-1900, �5 per car Tented village for England fans at Coopers' Field near castle, 1000-1430 Cardiff Queen Street Station closed between 1630 and 2030 for "controlled boarding" of busy trains Travel advice line 0845 602 602 0

It is just 300 yards away from the gate where England supporters will enter the stadium.

It will include bars, catering, an inflatable five-a-side pitch and live entertainment.

The village will close half an hour before kick off and will not show the game on television.

Superintendent Jeff Farrar of South Wales Police said: "All indications from the European Championships in Portugal is that the vast majority of supporters will come to enjoy the day. It is about providing something for the genuine supporters to enjoy.

"People are welcome to drink where they like - the reason we are doing this is because the feedback is that it works well.

"Hooligans will not be welcome whether they are Welsh, English or anything else."

He added: "We've had lots of information about groups of people travelling.

"England have obviously got a massive fan base from a number of different clubs.

"Of course we'd expect that possibly risk supporters would travel to the city."

Wales supporter Vince Alm said on Friday he was having trouble sleeping before the big game.

"I have been up all night - I am really looking forward to it," he said.

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"The atmosphere is going to be great - it is the old enemy."

South Wales Police have said no specific terrorist threat had been received about the game but security was being boosted as a "precaution".

The force said on Wednesday that armed officers would not be deployed on the city's streets but that the force had the capability to respond to any incident.

The two football teams met last in October when England won their home match in the World Cup qualifying Group Six 2-0 at Manchester's Old Trafford ground.

The Millennium Stadium is due to open at 1300 BST on Saturday, ahead of the 1500 BST kick off.