What a fascinating thread.
A number of my Allday family had shops on Bull Street in the early-to-mid 1800s, so I've been trawling the various posted maps, snippets and photos to see what I can learn about their location. Thanks to everyone who has contributed!
My 4 x great grandfather, John Allday, had his wire-working workshop and showrooms at number 30 from 1821 to around 1830, where he sold fenders, fireguards and the like. If the street numbers haven't changed, its location is shown in post #342, though whether it's the same building as in the 1820s, I don't know. I guess that plot would be under the south side of the Lewis building now, perhaps where the Wetherspoons is.
John's brother Joseph was his partner at number 30 until 1826, before they fell out and Joseph set up his own workshop at Dale End. Joseph later opened a shop at 51 Bull Street, near the Snow Hill end, in 1838, specialising in gauze window blinds. That venture seems to have lasted little over a year before getting into financial trouble, and Joseph soon had to relaunch the business after relocating to Union Street.
The eldest Allday brother, William, had a butcher's shop at number 39 from 1814. William handed over the shop to younger brother Thomas in 1833, who ran it until around 1838. I imagine this must be located the other side of the Minories, where the north side of the Lewis building is and towards the Meeting House.
Thomas Allday returned to Bull Street in 1844, and ran a butcher's at number 22 until 1864. Earlier in his career, before taking over Willliam's shop, Thomas had his own premises at the Crooked Lane end of Bull Street, initially at number 99 in 1820, but by 1823 was based at number 108, where he stayed until 1829/30.
This, I gather from the thread, would be the middle section of the Lamb House, next door to John Suffield snr. Number 108 was still a butcher's shop in 1835, having been taken over by George Pole. It must have passed to the Suffields not long after that. Appropriately enough, Thomas seems to have had a speciality in his 'house lamb', bred and raised at his farm at Acocks Green. I don't know when the name "Lamb House" first appears, but perhaps Thomas was carrying on an established tradition.