Tom Maynard's girlfriend, model Carly Baker, wrote on Twitter:
"My beautiful boyfriend Tom Maynard, I can't cope with this. I love you always and forever. You meant everything to me. We will always be together. I love you Tom X."
She added: "You're the most special man I have ever met. You made me the happiest girl. I love you always x."
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Specialist explosive detection dogs searched through the town examining letter boxes and phone booths for signs of potential devices.
Temperatures soared to 27.9C in Northolt shortly after midday on Thursday, making it the warmest April day for 69 years.
The South East will enjoy the best of the weather and along with Paris will be the hottest place in Europe.