Over a third (34%) of people aged 65 or over in Great Britain feel lonely, according to new research out today from Age UK and pioneering online young peoples charity YouthNet.
The research also shows that older people aren't necessarily lonely for geographical reasons.
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Find out what to expect from the weather if you are running in the big race in London or watching from the sidelines.
It will be a soggy start to the weekend and temperatures will drop making it feel colder than in recent days.