Instead of an advent calendar, this year sees London being invaded by a series of snow globes! They've appeared randomly around the capital. One currently envelopes Anteros (the statue normally, and incorrectly, labelled as Eros). And one envelopes various LEGO miniatures of London.
Here's the first image in the series, Buckingham Palace.
All these were built by Duncan Titmarsh, who also built the LEGO Christmas Tree at St Pancras last year.