Good shout, and as eburacum argued was it actually a butcher's shop? After all they didn't have a name for the shop and the only reason they concluded it was a butchers shop was that there were "oxen" carcasses on view. It might equally have been someone hanging meat in their own property, especially considering their appeared to be none of the signing and fixtures and fittings even a Victorian butchers shop.would boast.
Then there was the fact it was a Sunday morning in August, a time of the year in rural Suffolk that revolved around the harvest and church and so perhaps not surprising that any small village would have been quiet. But the biggest red flag for me is that once they had retreated from the village they:
"... saw the smoke rising from chimneys, none of the chimneys was smoking when we were in the village"
https://www.smithsonianmag.com/hist...led-to-medieval-england-or-did-they-35698485/
Given it was August in the 1950s, would they have had their fires lit anyway...? Seems very unlikely and even if they were cooking Sunday lunch then there was electricity even in rural Suffolk in the 1950s. It would have made more sense to see smoke rising from chimneys whilst 'in the past' rather than back in 1957 outside the village.
I am something of a believer in the high strangeness, often fleeting, time-slips but struggle somewhat with the extended cases,. Like the 1979 Gisby/Simpson case this one was not considered paranormal by the witnesses at the time it took place but rather at a later date and this is a bit of a red flag for me.