Some forecourts closed on Thursday amid a driver shortage that has caused havoc with supply chains.
A 38-year-old is arrested in Lewisham as police release an image of a second man they are searching for.
Business minister Paul Scully says the government needs to plan for a lengthy spell of high gas prices.
The compensation payment is one of hundreds by the Ministry of Defence, revealed for the first time.
The government said it is "looking at options" to deal with labour shortages ahead of Christmas.