hello - I have a new conversion on a T6.1 carried out by a reputable caravan company. the owner said that there is a manual shut off on the tank but it's very inaccessible under the vehicle. When I asked about how safe this was he said as there was only one gas appliance in the van (the gas hob) it didn't need to have an isolation valve. I'm nervous about driving the van while gas is 'live' and told him this. he then installed a in-line shut off valve for the cooker. However, I'm still really nervous about driving with the gas tank under the vehicle not being shut off. I'm really new to having a campervan and would very much appreciate peoples advice on this.