I had mine FREE from the place next to Birkenhead tip. You have to collect it yourself I guess. I did anyway.
The soil available is there in huge "mountains" and you just help yourself to as much as you want - bring a 10 ton truck if you wish, they are glad to get rid of it I think. If you smile nicely the man there will drop it into a truck with his digger scoop. HOWEVER do not let him drop it into your ordinary domestic trailer. He dropped it into mine and it bent the axle!! Take a shovel and DIY.
The soil has been made from composted refuse of all types - well composted ie YEARS. They sort out the glass, brick & rubble and crush those BUT the soil will always contain some small bits of those. Looks odd but I have to say the soil is good quality and weed free because it has been composted for so long. I used it to build two rockeries and they are doing very nicely
5 Precepts of Buddhism seem appropriate. Refrain from taking life. Refrain from taking that which is not given. Refrain from misconduct. Refrain from lying. Refrain from intoxicants which lead to loss of mindfulness