Just a quick update boys!!
I had the plate off as per Phil's instructions on Saturday. Checked the pipe in question along with all the others, and definietely no splits. However, when reconnecting it to the green plastic nozzle on the block end, replaced the single use clamp with a jubilee clip.
I saw from your Pic Phil, that you got yours off with the clamp still on, as I did. This would say to me that it was too loose. There was a bit of oil mist around the end of the pipe on mine, suggesting a leak.
Anyway, back together. I also cleaned the Throttle Body out with WD40. There was a lot of oil resdue on the Inlet Manifold side of the butterfly valve which was nice to get off.
Since then, the car has been boosting harder and has, so far, had no instances of hesitation.
I can also hear the DV a bit more than I used to. This would say to me that there is more boost present (No leaks anymore).
So guys. Just wanted to say thanks for pointing me in the right direction!!