Fog has disrupted flights for a second day while trainlines also suffered delays.
The poor visibility affected flights at London City Airport and at Heathrow in west London.
Fog shrouds Heathrow airport for a second day
On the railways, there were delays to CrossCountry and South West Trains (SWT) services in Hampshire due to a broken-down freight train in the Eastleigh area.
SWT passengers also had to contend with delays due to a broken-down train at Beaulieu Road in Hampshire which led to hold-ups between Southampton Central and Brockenhurst.
Travellers hoping for an Autumn break have been hit by delays as fog blocked pliots' visibility
A signalling problem between Saxmundham and Woodbridge in Suffolk delayed passengers travelling with Greater Anglia, with buses replacing trains between Ipswich and Saxmundham.
On London Midland, passengers were warned to expect possible cancellations due to train crew shortages, while First Great Western services were affected by a broken-down train at Greenford in west London.
On the Underground, there were delays during the rush-hour to Metropolitan and Jubilee line services due to a faulty train at Wembley Park in north west London.