"Standard B.S." are hives and frames that are manufactured to the correct standard. Those parts that are designed to be used with B.S. equipment are under"Non-standard B.S. and accessories".
The "National" hive is the most popular in the UK and suits non-prolific or native type bees admirably. However it may not be the best answer if you keep more prolific bees, but the B.S. Commercial brood box or 14" x 12" box can be used to house such bees, yet retaining compatibility with the National parts.
The WBC hive accepts British standard frames, the same as the National, but has reduced in popularity due to its complexity and cost.
The Smith hive takes frames that are "standard" apart from shorter lugs. It is popular in Scotland and the North of England.
The B.S. Commercial hive is also known as "16 x 10" and has a larger volume. It is suited to more prolific bees and is an alternative to "brood and a half" and Langstroth.
Non-standard B.S and accessories.
The "Rose" hive is effectively a National one sized box, about halfway in depth between a National brood box and super.
The "Rational" is a top bee space National with different designs for floors and roofs that was designed by Dave Cushman.
No open mesh floors were included in British Standards and there has been no standard design emerge, so they are included here.