When does weekly mean fortnightly?

What the Conservatives said on their local website in Guildford before the local elections:

Guildford Conservatives have pledged to keep weekly refuse collection.

And I think you can guess what they’ve decided to do now the elections are over, can’t you? Yup, here it is in all its glory:

Fortnightly waste collections waiting in the wings

AROUND 1,800 Guildford households having all recyclable rubbish – including leftover food – collected weekly from their doorsteps will have the rest of their waste picked up fortnightly. [Surrey Advertiser]