THE CURRENT SITUATION
At the moment, our sewers fill up when it rains - and untreated waste water spills out into the River Thames.
THE PROPOSED SOLUTION
The new "super sewer" would divert the waste water away from the river.
More top news
Police were called to Kilburn High Road at 5.20pm after reports of a shooting.
In just 24 hours the offer was retweeted more than a thousand times on Twitter.
What a year it's been full of ups and down, turmoil and change and it seems events here in London have got the entire nation talking.