Right, a little update. Last night went to a mates house and we:
1. Bled master cylinder (MC) at the cylinder itself
2. Bled ABS and MC at the ABS unit (top right of engine bay) this includes all 4 corners plus MC1 and MC2
3. Then moved onto each corner and in turn completly stripped down and cleaned all crud of sliding parts, deglazed pads (which were fine but just going through everything) and greased up pins etc and made sure pistons were sound and checked all brake lines and flexis.
4. Bled all 4 corners until no trace of bubbles what so ever have come through (there was non!)
The result being, they are still exactly the same, rubbish! The pedal is longer than is used to be and after the initial 'bite' nothing else happens and it feels quite 'wooden' at the end of the travel. At this point to recap servo seems to work just fine after initial thought it was faulty (foot on brake, start engine, it slowly sinks). Pads and discs are as good as new.
I am waiting for a rarebear cable to come through just so I can check any faults on the ABS unit - but this works fine if I REALLY bury my foot.
My remaining conclusion is the master cylinder being at fault however when in normal road use sitting at traffic lights with foot resting on brake it does not sink and I am losing no fluid at all. If when at lights I really press down on brake I can get it to sink more - what this means I am not sure at this point.
I sourced a replacement MC which turned out to be the wrong unit (no fault with the seller, it was always a gamble), I have taken photos of mine which are below:
There are a few different types on ebay but I think I am after this style of bendix unit:
Does anyone have any thoughts on the situation and a possible source for my style of MC second hand as £110 is too much for me right now when it may not even be the issue plus the worry about compatability again.
Any help will not be turned away!!!