regulator type for boc 2 litre bottles

[MoreWellie]

Hello, please can anyone tell me whether I need a vertical regulator or a side entry one for this bottle

The gas dealer said vertical but the picture on the boc page looks like side entry

Thanks Mike

 

[MoreWellie]

I rang BOC and they said I need the vertical regulator type

two votes was enough so I have ordered the regulator

Thanks anyway

Mike