Hi littlegirl, and welcome!
1. Can anyone say what was the waitlist cutoff for DCHS last year?
Last year isn't really relevant because they are using a different distance measurement this year, but you can see the distances for this year and previous years here: http://www.elevenplusexams.co.uk/school ... n-profiles
In the second round of allocations on 19th April the distance increased from 6.497 miles to 7.593 miles, all within catchment.
2. When do they stop taking from the waitlist ?
Once the 11+ result expires, which is in the autumn term.
3. Would a waitlist number eight stand a chance (we are out of catchment too ...)
I am sorry to have to say that it is very unlikely.