Chris - coming back to your lidded whatever - I worked on the assumption that your lozenge indicates a date of 19th October 1867 - of course if I have that wrong then the following won't make any sense.
Please look at the details within the diamond and tell me if my thoughts were correct, please.
Contrary to what we say usually about the National Archive images regarding British Board of Trade Registrations - i.e. that they protect, usually, only outline shapes of articles - your bowl appears to be one of those minority of examples where the Registration Nos., and corresponding images, concern not the shape of the piece, but design features applied to the article. In this instance it is the shell ribbed decoration on the outside of the container - and assuming the details of your lozenge do correspond to 19th October 1867 - then Rd. Nos. 212674/5/6 and 77 were for the protection of these apparently new decorative designs.
Mervyn Gulliver shows a large jug, by T/Webb, with this applied decoration on page 239 - and on page 270 he gives details of all four Registration Nos. which are a repeat of the National Archive images I've attached.
Not everyone has a copy of Gulliver, so these attached pictures will enable those that don't to see what we're banging on about.
Although T/Webb Registered these particular decorative features as being unique to them, virtually identical designs (for handles, prunts and feet etc.) were Registered in 1868 and 1870 by Boulton & Mills - and then again in 1870 Hodgetts, Richardson & Pargetera appear to have repeated the exercise. Details of these non-Webb's designs are also shown in Gulliver, and presumably there was sufficient difference in these other non-Webb designs to avoid plagiarism/infringement and subsequent litigation by T/Webb.
Ref. 'Victorian Decorative Glass - British Designs, 1850 to 1914' - Mervyn Gulliver - 2002 - Schiffer).