I'm sure this question has been discussed in the past, but I missed it.

I'm just now reading Harry Potter and the Philosopher's Stone for the first
time. After shopping in Diagon Alley, Hagrid escorts Harry to Paddington
Station so that he can catch the train back home to Surrey.

My question is, are there really any services from Paddington to Surrey?
Shouldn't he have been at Waterloo? Or is this another example of wizardry
in action?

I hope someone can enlighten me on this. I couldn't sleep last night
worrying about it.