Thank you, Ann.
Frank - though photographs can make the (3) bridges look as if they are quite close together, actually they are quite far apart. so it is simple to be in a position *between* the bridges, and anyway, I know that area pretty well. Both road bridges will remain in use - one northbound, one southbound. No-ne will be allowed on the new bridge except, I would guess, those who are willing to pay a large "facility" fee. and my guess for that would be £750-£1000 per day or part of a day.