I have the same bike and ride it every day, for £20 it's phenomenal value. These are the mass production team replica bikes from the mid eighties, produced 1985 through 87 I think, with the carbolite ones coming at the end of that period. I'm really really happy with mine, it's a great ride and very comfortable.
Bar tape was something similar to Benotto tape, orange nylon/vinyl I'm not a fan. The saddle is original, but terrible. It was a cheaper plastic version of the original leather Turbo, you can get a much much nicer version in the current production model. Drive train is probably sachs-huret with simplex shifters and works well enough, I found that I needed to strip it down and give it a really good clean as it hadn't been maintained for some time, but once I had done that it was fine as friction shifting is incredibly forgiving anyway, although it may be geared a little high.
The CLB brakes are single pivot, not terrible in the dry, but they are pretty scary when it gets wet, by the 80s when this bike was produced they were losing ground rapidly in terms of performance with campagnolo and shimano, being bought by Sachs in the mid eighties, who in turn were bought by SRAM.
I'd replace the brake levers and brake pads if nothing else, this will make them perform acceptably in all conditions. I also had the rear frame respaced so that I can fit modern wheels in, and currently running 10 speed rear block with simplex shifters no problem, although it's at the edge of what works.