No, there is definatley a section showing 70mph in a red ring.
I've ridden through it twice in the last month.
I tried to find them on Google maps but couldn't remember the exact location.
Not really!
I'm now more confused!!
My understanding with regards to a dual carriageway is;
National speed limit of 60 unless the opposing lanes have a physical barrier and then the national limit is 70mph.
So why display a 70mph speedlimit and not a national speed limit sign?
As I have already explained (maybe badly) The national speed limit is depicted by a white circular sign which is displayed with a black stripe diagonally across it from right to left and often followed by the 70 limit that applies.
If you're on a dual carriageway and driving a car or motorcycle the national
limit is 70mph. If you're on a single carriageway and driving a car or motorcycle the national speed limit is 60mph.
If there is no central barrier, the 60 limit applies as it is still deemed as a single carriageway but with 2 lanes in each direction
On a Motorway you will often find a posted 70 sign as confirmation that the national speed limit for a multi lane road applies. If it is a lower limit in force then a lower limit will be depicted,
Do not confuse what is applicable to other classes of vehicles as they are governed under separate regulations under the same act.
Does that help now?