Broadway EK TB LP BBQ operation

I have a 2018 Broadway EK TB LP and have just returned from Wales and BBQ worked fine. I have tried it again at home since returning and there is no gas at the BBQ. There is gas in the tank as 3 green lights illuminated on the gauge and all rings light on the cooker hob so proves there is gas.
I removed the hose from the bottom of the regulator to eliminate the bbq out the equation and turned the valve on at the connection point and still no gas. Could it be there is insufficient pressure in the tank ? 
Does the pressure need to be a certain level to activate a valve ? 
Any help appreciated folks.

The bbq point is usually joined into the fridge pipe so needs the fridge gas tap to be turned on. Could that be the problem?

Will give it a try thank-you. I had the fridge turned on whilst away and no issues but fridge was OFF when I tried it at home so that is possible the answer.

The fridge itself doesn't need to be on, just the fridge tap on the manifold.

As you can see from the attached photo, in the case of my Malvern, it is taken off the fridge supply line. I believe most of the AS vans are of a similar gas pipe layout.

The Stanton has three taps in vertical configuration and yes, the fridge tap needs to be turned on, as the o/s bayonet fitting for the bbq is in the same line. 

I can't find any mention of this at all in the AS manual!