[Tagging] Relations without type?

[wynndale at lavabit.com]

The NaPTAN data import is creating a lot of relations tagged
public_transport=stop_place without a type key. Keep Right complains about
the relations because the type key is missing, and these are a high
proportion of Keep Right messages in London, which makes the validator
more difficult to use. If disable the Relations without type check I can
run the other checks but not identify corrupted relations. The missing
type key is undoubtedly unusual for relations but it it wrong or is the
check weong?