It does, the first part of my post shows this on the TV. But for the BBC Micro I'd need to physically hack the Morley quite a bit to take composite input. I also have an Acorn Teletext Adapter, this can easily take composite instead of RF via a jumper.
Ah thanks for this clarification - I was wondering what the need was for the RF modulation and if it was necessary for just plain old TV use. Great project and thanks for bringing the possibility to my attention!