Raab has slightly retracted / changed his earlier statement about meeting 'people' ( which I think infers plural and assumes from second, but same household) and BBC now reporting: (NB I don't think much of BBC reporting these days but as its the main source Brits check their news lets just go with it for now)
"Asked about that advice on BBC Breakfast on Monday, Mr Raab said: "So we've said that as long as you go out of home, for the park, for exercise, whatever it may be, you can go with members of your own household.
"If you're out in the park and you're 2m apart... and use some common sense and you socially-distance, you can meet up with other people."
Asked if someone could meet more than two people at different times, for example their mother in the morning and father in the afternoon, Mr Raab said: "Outside in the outdoors, staying 2m apart, yes."
However, the UK government put out a clarification saying people can only meet one person outside at a time - not two people, such as both parents, at the same time.
It comes after Mr Raab incorrectly told the Today programme that someone could meet both their parents at the same time "if there's 2m apart".
To me the bit about your mum in the morning and dad in the afternoon / one person rule is a bit of a bonkers flawed statement if we assume your parents live together!