When will I see any grapes?

Planted these three grape vines about 4 years ago. I'd say they're very healthy as they're taking over part if my garden. Planted against a high wall that gets the sun all day. Not seen one grape yet, any ideas why not?

 

@GardenGaz what type of grapevine do you have and do you prune and feed it?

We have a grapevine in the greenhouse, which we have had 2 years and it has fruited both years.This is it now.

 

Grapes do need a certain amount of summer pinching and pruning to produce decent grapes, along with a good prune in december.
I planted Lakemont seedless three years ago outside, this year, at the moment, things are looking good.

 

Are we seeing all three plants in that picture?