The address search lists the house numbers in the street, odd numbers first then odd numbers added later, followed by even numbers then even numbers added later.
Some additional addresses (those who did not respond to the registration at the time) were not added to this register but added to the later register these are not available.
Cheers
Guy
Thanks to the brilliant guidance on here, I was just able to check the addresses in Slaidburn Street, Chelsea. I'd expected to find my grandparents and other members of the family (they were mainly houses of multiple occupancy) - in 1934 my grandparents were on the electoral roll at number 45, although they had also lived at no 44. Checking the list of house numbers, all the numbers are consecutive but annoyingly stop at number 43 and resume at number 49.
So frustrating!
Guy, what am I missing this time? You've been so patient and informative, perhaps they would have been on the later register you mention, although I don't know why a run of houses would all have failed to respond.

Pat