Very Late / Early Breeding Behaviour

Remember that prolific pair of Collared Doves that nested on the neighbours satellite dish and security light last year? After the last nestlings fledged, the neighbours decided that they'd had enough pigeon shite spattered just outside their back door and dislodged the now empty nest. How I laughed when I noticed the Doves collecting twigs and stuff from our garden bewteen 22nd - 28th December. By 29th, the new nest on the same security light was complete, and the female has been sitting tight on the nest since 31st. Surely the latest and earliest breeding bird in VC55 during 2008 / 2009?!