World-beaters Sarah Storey and Jonathan Fox have led the gold medal charge for ParalympicsGB on a dramatic first day of the Games.
Cyclist Storey powered through her event by smashing her own world record in the heats before storming to victory in front of a frenzied crowd in the Velodrome.
Fox, who also set a new world record in his qualifier, won Great Britain's first swimming gold at the Aquatics Centre. The pair were the standout performers on a successful first day, which also saw British athletes win three silvers and two bronze medals.
Storey's victory is remarkable because she started her career in the pool before switching to the track. The 34-year-old, from Manchester, now has eight Paralympic titles and 19 medals in total since making her debut in the Barcelona Games in 1992.
Speaking after her win, Storey, who was born with a partly formed left hand, said: "I always thought that if I could get off to a great start it would set up the week and hopefully that's the case. To get the gold medal is a dream come true."
Fox, 21, who was born in Cornwall and trains in Manchester, is known to use a Rubik's Cube to get into the zone before a race. The swimmer, who has cerebral palsy, led from the start as the capacity crowd went wild. He said: "It was really, really amazing. When you touch the wall the crowd just roars."
Britain's first medal of the Games was won by Mark Colbourne, who completed a dramatic turnaround after fighting back from a horrific paraglider accident just three years ago. The 42-year-old broke his back in the incident in May 2009 and required five months of physiotherapy just to get back on his feet.
He won silver in the Velodrome, less than an hour before Storey's gold. Speaking afterwards, Colbourne, of Newport, South Wales, said: "It's very exciting. We have worked for the last 18 months towards this."
Partially-sighted Ben Quilter fought back from the brink of adversity and overcame the odds to win a bronze medal in the under 60kg judo. The 30-year-old revealed after the event that he had torn his cruciate ligaments just seven weeks before the Games.
Swimmer Hannah Russell, 16, who has achondroplasia, a form of dwarfism, narrowly lost out in a superb duel with Oxana Savchenko as she won silver in the 400m freestyle.