With effect from Friday March 29th, mats are no longer in use on fairways - you may prefer your lie if required.  

Reminder of the rule on preferred lies:

Model Local Rule E-3: Preferred Lies
"When any part of a player's ball touches part of the general area cut to fairway height or less, the player may take free relief once by placing the original ball or another ball in and playing it from this relief area:

Reference Point: Spot of the original ball.
Size of Relief Area Measured from Reference Point: [Specify size of relief area, such as one club-length, one scorecard length or 6 inches] from the reference point, but with these limits:

Limits on Location of Relief Area:
Must not be nearer the hole than the reference point, and
Must be in the general area.

In proceeding under this Local Rule, the player must choose a spot to place the ball and use the procedures for replacing a ball under Rules 14.2b(2) and 14.2e. But, for the purposes of applying Rule 14.2e, the player has only chosen the spot on which to place the ball once the ball has been set down, and the player has let the ball go with the intent for that ball to be in play.