Interesting Pagey - where do you get those guidelines from?
The bench book here
http://www.jsboard.co.uk/downloads/acbb/comple te_06v2.pdf
Has 21-30 mph over the limit in 60-70mph limit as 4 or 5 points or disqualify for up to 42 days.
It's dated April 05 - do you have a more up to date reference?
In any case debstra you're probably OK unless you have previous points.
Note if you've held a full license for less than 2 years and you rack up 6 points your license will be revoked and you'll have to retake your test.