When I paid the initial deposit I was given build week 4, 2020 as the date on which my Seven would go into production and true to form on 21st January I received an email from Euan at Caterham confirming exactly this.
Based on the standard 8 week build time this means the delivery window could open up from 16th March.
However, Euan went on to say that Caterham are currently running ahead of schedule raising the possibility of a slightly earlier delivery (maybe from the week before ? – 9th March onwards…we’ll see how things go).