OK so now I have drawn up two circuits, one for the Video modification and now one of the line timebase.
I am using a Thorn 900 lopt with the full EHT overwind, this has to be the best lopt for what we are doing, using a 950 or 1400 type will still need a doubler as the resultant EHT would be too low running the timebase on starvation mode. The snag is the red topped 900 lopt's are quite rare. Don't worry though if you want to try this use the doubler.
On the diagram you'll see T1. It's the blocking oscillator transformer, virtually any will work but values may need changing, I'm using one from an early Ferranti it's small and neat so can be fitted into the bush chassis with ease. Smoothing needs to be upped a bit as the 25 hz frame can breath a bit so an extra 100uf on the main HT line is added and a 22uf on the 105 volt line to line output is added. The screen grid feed to the PL36 is fed from the main HT line via a 5K this works the best, there is also a choke fitted to the PY81 cathode and it helps to suppress some of the line stage ringing, it is one of RS's 1 amp chokes but does the trick, no timebase tuning is required as it is running on very slow speeds and low HT so the ramp up time can not really be damped.
I also will later upload the circuit of the frame timebase.
Any errors I may have missed please let me know.