Did the aforementioned on the way home from work tonight. OMFG!!!
There was me thinking it'll be speed restricted what with those average speed cameras at each end and what do I find? National speed limit
By this time I am down to 50mph and see the sign, bliss and I drop it to third and floor it. Fanbloodytastic! My zed sounds ace, windows down. God I am such a kid!
Do it, do it , do it!
Might I add the tunnel is an engineering marvel and cuts loads of a journey, great work!