1. Loch Ness has a famous snake. This statement is referring to the legend of the Loch Ness Monster, which is often described as a creature resembling a snake or serpent. Therefore, this is considered True (T) in the context of the legend.
2. Balmoral is in London. Balmoral Castle is a royal residence located in Aberdeenshire, Scotland, not in London. Therefore, this is False (F).
3. Oban has a famous cathedral. Oban is a town in Scotland known for its picturesque setting and as a gateway to the Inner Hebrides. It has a notable Roman Catholic cathedral, St. Columba's Cathedral. Therefore, this is considered True (T).