We have reason to believe that the missing woman has been murdered and we'd urgently like to speak with Jack Wall in connection with the inquiry.
It is likely he may be in the Stevenage area, but he could be further afield.
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Plenty of fine weather is expected across the UK with many areas seeing some good spells of sunshine.
Among those stranded were two newlyweds, who were forced to spend their wedding night at a rest centre at Okehampton College.
The 42-year-old is said to have been involved in a collision with two other cars while he was driving in West London on Sunday (18th March)