The county council said snow had caused problems on some roads, particularly in hilly areas where lorries got stuck.

BBC: 'Difficult driving conditions' after Staffordshire snow

Networks using lower frequency spectrum tend to fare better in rural areas as their signals propagate better, especially in hilly areas.

BBC: Mobile firm on rural net crusade

"When we put e-bikes in hilly areas of London I don't think we're going to have any shortage of riders... if anything, we're going to have a shortage of bikes, " says the mayor's cycling commissioner, Andrew Gilligan.

BBC: Electric bikes: For people who don't cycle?

But even when ownership is confirmed, the geography of Port-au-Prince, with its narrow streets and hilly terrain, can make many areas difficult to get to with machinery, he says.

BBC: Why has so little of Haiti's rubble been cleared?