Harnall Lane Garage

I know that Harnall Lane Garage opened in 1921. I also know, from photographs that, by the late 1930s, the roofed area was very large. So I have some questions:

1. When the garage opened in 1921, was it smaller than it was in the 1930s?
2. In its later years, apporximately how many buses could be fitted inside the garage building?

All answers greatfully appreciated

with Kind Regards
Laurence

to the forum Laurence and good luck with your request