Oyster PAYG (Prepay) on Freedom Passes

TfL tell me that Oyster Pay As You Go (PAYG, formerly prepay) can't be loaded onto Oystercards containing Freedom Passes. Didn't make any sense to me - so I tried it online. www.oystercard.com recognised by its number that the card contained a freedom pass, but did not restrict what products could be loaded onto it.

This makes much more sense, but I can't accept any responsibility if this doesn't work properly. If it does, however, it means Freedom Pass Holders can access cheaper Oyster Fares outside the time that their Freedom Pass is valid.

One Day Travelcards and Oyster

Poor chap on the Gospel Oak Line today had asked for a zone 1-4 (one day) travelcard at Seven Sisters station. I don't know what he finished up with, but he produced an Oyster receipt for PAYG (Prepay), for about the cost of the travelcard. It seems the Underground ticket clerk had assumed he was only travelling on PAYG lines (ie Underground, DLR and a smattering of National Rail lines).

Not impressive. The one day travelcard is not available on Oyster. Instead, the PAYG system caps the PAYG fares at the cost of a travel card - but PAYG isn't available on most National Rail Lines.