I returned to the attack today! Having a day off work gave me the opportunity to make more progress and I approached things in a steady calm way' Hopefully, this will pay dividends later.
Whilst the head was off the car I remembered that the heater had not worked for some time so I backflushed that whilstI had the chance.
Then carefully cleaned up the block, blew through the waterways as much as possible with an airline, cleaned off the surfaces and generally did everything I could to give myself a good chance of it going right this time!
The cylinder head was all nice and shiny as it came from Dale's and finally I lifted it onto the block as you can see here with the cylinder head bolts and nuts etc in place. I couldn't torque it down as my torque wrench is over with PMW but it's good to see the engine looking more like an engine again.
Another bonus is that with the cylinder head off the bench and a bit of time put aside for tidying my work area in the garage actually looks clean and tidy for the first time in many months, well, by my standards anyway!