Q.Tomatoes
Dear sir / madam
I planted my tomatoes from seed at the end of May, following a five weeks holiday.
All of them are between one and two feet in height, but there are no fruit trusses?
How can I resolve this?
kind regards
Dave Roberts

Depending on the variety you are growing it can range from 50 to 100 days for your plants to bear fruit.
These links have more information for you.
https://www.gardeningknowhow.com/edible/vegetables/tomato/growing-tomatoes-from-seed.htm
https://www.gardeningknowhow.com/edible/vegetables/tomato/growing-tomatoes-guide.htm