Just to put some numbers on this, in Greece this summer a pack of 30 g. of rolling tobacco cost €7.20. For comparison, in the UK, the same costs £13.60 or €15.42 - so more than double the money.

As others have reported in this thread the tax on tobacco is 70% in Greece. I'm not sure what it is in the UK.

The detail to take into account is that Greece produces tobacco locally. So it's going to be cheaper.

Bottom line- I'm not convinced it's the price that's making a difference.