Bon Jovi said they are looking forward to performing at Hyde Park as part of the Barclaycard British Summertime Festival which starts at the end of June. They added they were not concerned about noise restrictions or the British weather which caused problems at festivals last year.
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Monday's temperature was recorded at Kew Gardens, west London, where visitors enjoyed temperatures 10 degrees warmer than Milan at 8C.
The Central and Waterloo and City lines will be affected, with other stations and lines likely to be busier than normal.
Rebecca Steinfeld and Charles Keidan want to secure legal recognition of their seven-year relationship.