Jason,
I believe you are correct about the Carol Wales rolling to starboard onto Big Boy. I suspect that somebody was pulling scrap from Big Boy and opened her hull to the sea. She then took Carol Wales down with her.

I saw them the day before the sinking and both looked sound. We did have heavy weather (max. sustained winds 26.00 MPH, max. gust 40.28 MPH) that night which didn’t help but I don’t think it would have been enough to take them down in such a sheltered area. If it had been weather related Carol Wales would have taken the weather and gone down first.

I’ll post a shot of Carol Wales sitting on her side on top of Big Boy. (see wrecks & relics)

Thanks also for the warm welcome,