Those dinner parties happened pre-93. This argument will be considered in Supreme Court.
Moreover 6yrs in prision actually means 3yrs -(1 less day for 1 day of good behaviour). He has already spent 1.5yrs and hence even with the current sentence he only need to spend 1.5yrs only.
If supreme court reduce his sentence from 6 to 4 years, it will actually mean 6 months of jail only. Which won't be a big deal.
So fame & money will find him a way out - no matter wat the offence.