Hi, I am assuming that this is Newborough, near Burton-on-Trent. There were at least 6 pubs in the village and the following attachment is a history of the village and does mention these pubs, but there does not seem to be one called The Lamb. It may help you to narrow down which building this pub was in.
newboroughvillage.co.uk/information/BoN_FINAL_2.pdf
The pamphlet is a very interesting read. There was a pub called the Shoulder of Mutton and in White's Directory in 1851 the landlord was William Collier. Apart from that there were two beerhouses one run by William Bradley and the other Isaac Woodings.
Hope this helps and good luck.
Cathy