Don’t worry – They’ll get there eventually – my tomatoes were full size (but green) for at least a month before they even showed a hint of red! They were definitey worth waiting for. As they say, patience is a virtue
My tip – You could try putting the green tomatoes in a paper bag with a ripe apple. The apple gives off a gas, which speeds up ripening process.
And Finally, You can always eat your tomatoes green!
You Can Grow in Winter! 
Polytunnels 
Have a healthy Polytunnel
Don’t worry – They’ll get there eventually – my tomatoes were full size (but green) for at least a month before they even showed a hint of red! They were definitey worth waiting for. As they say, patience is a virtue
My first tomatoes usually ripen mid/end July, so there is still plenty of time.
My tip – You could try putting the green tomatoes in a paper bag with a ripe apple. The apple gives off a gas, which speeds up ripening process.
And Finally, You can always eat your tomatoes green!