Here's a nice picture of my Teletext Beeb. I was a bit concerned that I wouldn't be able to pick up anything with the Teletext Adapter, but with a bit of fiddling (well, constant re-tuning and flapping of aerial throughout the whole weekend) I managed to get a decent picture on more than one occasion.
I bought the aerial specially for Byte-Back, suspecting that there wouldn't be an outside aerial I could connect to at the venue. Due to some careless "mislabelling" at the shop where I bought it, I was hoping to get a much more powerful aerial with mains power booster, but it turned out to be three times the price and beyond the BeebMaster Byte-Back budget, so I had to settle for this. As a result, I wasn't really expecting to get any reception at all, so I was pleasantly surprised.