Thanks Nigel
I have been stung with the  tunnels tolls you mentioned before,so know about these,read a post last year were the forum member left the AP7 at various junctions then rejoined ,last time I was down at the finca was in February this year, and with the petrol and tolls it was a expensive day out from Barcelona £70 ish  I realise there is the N11 which I could use further down but it is just too slow !!
I dont know the exact miles,400+km, but drove from above Barcelona across the pyrenees, to the Val d Boi this summer on the new uprated free A2, and only paid less than 10 euros there and back and these tolls were comming into Barcelona.
Is it just that I am a tight Yorkshire Man ! ;D