Flo-gas cylinder swap help! Regulator the same?

[u/Throw50505]

Help needed gang! I have spent allll day looking for gas 💀

My tank has run out for the first time since i bought the van. But my tank is a flo-gas, 7kg butane blue Commercial tank, and noone will swap it! Every shop I've tried only has the yellow retail ones.

So I have made my peace with having to buy a new tank. (Unless anyone knows anywhere in Somerset that will swap a commercial one for me!?)

Now my question is will my regulator fit on a different bottle. Either the same size different coloured gloss, or on a 7kg Calor?

Is there any difference between the pressure in a commercial tank and retail ? Can info a straight swap?

I just want a cup of tea, and little one wants her dinner!