Apparently tea was sold in coffee houses in London and the merchant Thomas Garway offered it in dry and liquid form; his first public sale was in 1657. The sale of "China Tcha, Tay or Tee" appeared was announced in 1658, in the newspaper Mercurius Politicus, booked by the owner of The Sultaness Head Coffee House. In 1660 Garway again advertised tea at his own coffee house, Garraways. It was sufficiently in use that in 1660 it was actually taxed; "For every gallon of Chocolate, Sherbet, and Tea, made and sold, to be paid by the Makers thereof, Eightpence," and inspectors were appointed to visit the coffee-houses twice daily to see the quantity brewed . Pepys mentions his first cup of tea as a novelty in 1661 "I did send for a Cup of Tee, a China Drink of which I never drank before." He doesn't say whether he liked it or not.
So Catherine of Braganza couldn't have introduced tea to England since she didn't arrive here until 1662; however, she may have made tea drinking more fashionable.