Police patrols have been increased in Cheshunt after a school boy was sexually assaulted.
Olympics: Day One From The Lee Valley
Team GB's men safely made it to the semi-finals of the canoe slalom after a nervous start at the Lee Valley White Water Centre.
With only the top 12 qualifying for the semi-finals, Beijing silver medallist David Florence was left languishing in 13th after the first run.
The world number one from Aberdeen said he was relieved to have qualified after he pulled out a much faster performance in his second run to secure his place in Tuesday's semi-final.
Richard Hounslow also faced crashing out in the heats when he got off to a slow start but, under pressure, he again delivered and finished 11th overall.
Speaking afterwards, the 30-year-old from Loughton said he always knew he could qualify.
He said: "You have to believe in your own ability and in the work that you have done over the years, that you can do the job on the second run.
"I felt that I could do the time that I needed to do. The crowd were fantastic. It has been amazing.
"There was a huge roar from the crowd when my name was announced on the start line. I never expected anything like this but it is a great showcase for the sport."
On Wednesday, Hounslow will have to step up another level if he wants to qualify for the final. He was 5.63 seconds off the pace set by Germany's Hannes Aigner, who won the kayak heats, and only the top 10 qualify for the final.
For 29-year-old Florence, his main aim was just to qualify for the semi-final, but he will also have to improve against Slovakia's Michal Martikan, who won the heats in a time of 90.56 seconds in his second run after missing a gate in the first go.
Florence said: "I don't think anyone can be certain of qualifying. It was a big pressure situation on my second run.
"The first run didn't quite go according to plan but there wasn't that much wrong with it but the time added up to being a long way off the pace required to go through, so I am just relieved to have done that.'"
On Monday both men come together in the two-man canoe. Their sternest opposition comes from Slovakian twins Peter and Pavol Hochschorner.
Known for their telepathic team work, the brothers won gold in Sydney, Athens and Beijing and are overwhelming favourites.
On Tuesday, Florence is eighth up, starting his first run at 1.51pm, while Hounslow starts fifth on Tuesday at 1.42pm, just ahead of Ireland's Eoin Rheinisch, who also qualified.
Lee Valley White Water Hertfordshire
Heart has been out and about near the Lee Valley White Water Centre as Olympic competition got underway
A "monster'' teenager is due to be sentenced later for murdering two strangers in Colchester in 2014.
Nearly 7,000 weapons have been handed in across Essex during a knife amnesty campaign.
The election to see who will be Essex's next Police and Crime Commissioner takes place on Thursday, 5 May.
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