I live in a flat in East London and only have a small terrace. I was interested to see the experiment Monty has underway to test 3 different ways of growing tomatoes.
For many years I have been growing the old favourite Money Maker and regardless of the weather have a consistently massive crop, far more than I can consume. And they are grown in 10 inch plastic pots with minimum quantities of good quality bought-in compost and regular feeding and daily watering throughout the summer..
I wish you well with your experiment and it will be interesting to see if your conclusions confirm the above.
Best wishes on this longest day,