McLaren F1 GTR Longtail #19R + F1 TOO spotted

[Toby]

It's always great to see cars like the 12C, 650S and P1, but for me, nothing beats this!

Earlier I stumbled across F1 GTR Longtail #19R! It was a big surprise for me, and I then peered inside the workshop, to also see the F1 with the number plate F1 TOO (I think it was that car!) I was just wondering if anyone knew the chassis number of that car? Thanks