As Kevin said earlier, reg 95 makes it mandatory to pay the LL where arrears are 8 wks or more, with a limited exception. Data protection provisions don't override this, otherwise the reg 95 provisions could be challenged by a clmt on DP grounds, and there would be no point in including the limited exception.
In any case, all the LL will know is that there is an award of HB and how much it is, but none of the clmt's other personal details.
I'd say they'll easily be able to work out the HB award from the payment schedule.
Interesting thread here from pre-LHA days about LL's rights in such cases http://new.hbinfo.org/forums/topics/appeals-against-direct-payment-decisions
