Many climbers seem puzzled by the concept of (T) and (B) ratings on ice axes. Let me try to explain this concept. Axes are either rated (T)echnical or (B)asic. All climbing axes are rated (T) per default. The confusion arises because the picks are also (T) and (B) rated. (T) Rated picks are stronger and heavier. They are primarily designed for mixed climbing where rock work is involved, they are however also suited for normal icefall climbing. (B) Rated picks have finer blades and are only suited for pure water ice climbing.
For Scottish mixed or hard alpine climbing I would recommend the use of (T) rated picks as (B) rated picks may not be strong enough for mixed climbing.