Take your age off your CV for a start, if it's currently on there, and perhaps consider removing the specific dates off the jobs in which you were employed so that an employer can't necessarily work out how old you are.
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As from yesterday the law is now on your side, so if you feel you have the qualifications for a job and don't get it, contact the employer and ask for feedback as to the reasons why you were not successful, and ask what the age was of the individual appointed. You could even be cheeky at interviews and ask how the company is dealing with the Ageism legislation and whether they have any roles where this could be an issue because of physical safety, etc.
But above all, be confident that you've done all you can to present yourself smartly and sell your skills to the best of your ability. If you appear enthusiastic and energetic they may not guess how old you are. (And if you have a few grey hairs, why not resort to a hair colourant? "You know you're worth it !!!!)