@izzythepush,
I used to get depressed at how late the sun rose in UK and Ireland during winter.
Id seen lotsa greenhouses , well designed and built (Id ventire to say that the Brits had as many greenhouses as we have swimming pools).
So what month in the year do you set your plants out into the garden?
Do you get over 300 tomatoes per plant over the summer?
Then you have a good tomato growing country. In our country, in places like MAine, for example, tomatoes are a tender crop where in house or greenhouse starts are necessary and, even in the full summer, they only get about 1/3 of the full amount of tomato "sets" and ripe fruits.
We usually plant "indeterminate" varieties because they will set fruit all summer and into the fall, whereas "determinates" will set most all of their fruits at once and deliver up a big crop per plant).
Growers choose determinates for market growth and they plant several crops of these big bearers for farmers markets or canning.
Last year I had a "celebrity" tomato that produced over 500 fruits.