Complex sentence: Air travel was disrupted in the United Kingdom, with Southampton Airport cancelling (or diverting) all inbound and outbound flights until midday due to a frozen runway; train service was cancelled for most of the day from Southampton Airport Parkway.
Split into simpler sentences: Air travel was disrupted in the United Kingdom, with Southampton Airport cancelling (or diverting) all inbound and outbound flights until midday due to a frozen runway. Train services were cancelled for most of the day from Southampton Airport Parkway.