Internal charges between the HRA and General Fund

The segmental analysis reminder in the LAAP bulletin put us to thinking about the very small amount of internal trading which still goes on between the HRA and General Fund - repairs etc.

I don't want to impact the HRA in any way at all but the Code is less than helpful. Can anyone suggest whether the following means that internal charges and income stay in the HRA and are shown as such, or need to be removed?

I75 says 'Special consideration needs to be given to the statutory HRA... material balances of internal trading operations providing services to the HRA should be repatriated to or from the HRA'