England head coach Eddie Jones expects France to try anything to unsettle his side in their quest for a first Grand Slam since 2003 in Paris.
Jones' men go into Saturday's clash at the Stade de France with the Six Nations title already secure, but are desperate to complete the perfect campaign to match the feat of Clive Woodward's World Cup-winners 13 years previously.
And the head coach has warned his players to expect the unexpected as they prepare for the momentous occasion.
"You never know if there is something we might not be ready for," he said.
"We made some contingency plans on Wednesday evening with some of the main players and talked about what could potentially happen. We wanted to get them thinking about it.
"Everyone's got to be on their toes. If we get a smaller warm-up space, if the marching band starts walking into our warm-up or if they let loose 15 cockerels... We're going to have to round them up, put them back in their cage and get on with the warm-up.
"I would imagine that at the start of the game there are going to be marching bands and cockerels racing around.
"This is a big game for us and the rest of the tournament. Everyone outside the English doesn't want England to win. The French are going to be doing their absolute utmost to make sure we don't win. We've got to be good enough to cope with it.
"I'd imagine there will be everything French going on at the start of the game and you'd expect that. You'd be disappointed if that didn't happen."
Jones recalled a time when he was head coach of Australia, and had to contend with less than ideal pre-match preparations for a Test against South Africa.
"I'll always remember when we beat South Africa in Sydney and then went to Johannesburg two weeks later to play on Nelson Mandela's birthday - the great man," Jones said.
"The bus comes late, we're late to the ground, there are spears going through the wall during the warm-up - everything you can think of.
"We get back to the dressing room after the worst warm-up and who's sitting in a golf cart in front of our dressing room? Nelson Mandela.
"No-one can tell him to leave, obviously, so we have to wait outside the dressing room. We got back just in time to come out for kick-off.
"I would imagine all this is going to happen on Saturday. I'd be disappointed if it doesn't. We've got to be good enough to cope with it all."