Got talking to a mobile valeter today on a job, be had the same van as me and was moaning about thr fuel consumption (connect)
he said he had a 400l tank in the back so i said can i have a look, so he opened it up. i had a liitle look round then asked him how it was secured in as i counldt see any thing. and to my horror me had a 1ft peace of 2x1 held on by on screw at the side of the tank to stop it movin from side to side

he said it had never fallen over :

when i asked him what about a head on crash he thought the bulk head would protect him... cant see it meslf like
he was telling me loads of valeters he no's do the same
any one else come across this ??
many thanks
colin