Stephen Furley wrote:

The closure of Snoww Hill also seems a bit odd. The fact that Moor
Street wasn't closed at the same time seems to suggest that New Street
didn't have the capacity to handle even the small number of trains
that served Moor Street at the time, and almost as soon as Snow Hill
closed there was talk of re-opening it.

Moor Street was built when the North Warwickshire line opened, and
served as a terminus for those services, and also the local services on
the main line. Snow Hill was closed when there was no longer any through
traffic and no westbound local services (which went when the Stour
Valley line was electrified, as did the long-distance main line
serivces). At the time, it would have seemed eccentric and expensive to
keep Snow Hill going.
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http://gallery120232.fotopic.net/p10907024.html
(60 033 at Longsight, 9 Feb 2002)