I flew up to Manchester that day from the South... Saw the Notam - If I remember correctly, the TRA was a circle around Kemble and not defined with Lat & Longs.... Not exactly hard to avoid.. I also made sure I was speaking to a radar service the whole way past it (Bristol) for just in case I ran off track.
The more infringements there are, the more justification the CAA will have for over-regulating us..... As for the AIS site, try reading the instructions, I have and it seems to work easily every time!