Justine Francesca Glenton's only appearance on As Time Goes By as the character Daisy was recast.
Los Angeles is 8 hours behind London.
If Jean and Lionel arrived home at say 8am London time, with roughly an hour's drive from Heathrow, another hour in customs and luggage, their flight would have landed at Heathrow around 6am. It's a 10 hour flight from LAX, and an 8 hour time difference, so their flight home would have departed Los Angeles at 12pm PST.