starling roost location?

Please could anyone advise me of a good place to go to watch starlings coming in to roost en masse?  we had lots of starlings in our garden this year, especially during the nesting & fledging season - my son and I really enjoyed them, and I would love to take him somewhere fairly local to experience a big roost, but don't know where to go...?  we're in Stevenage (Herts) & would be really grateful for any ideas.

PS I was thinking of going November time but if any of you with more experience think there's a better time of year, please do say!

thanks for reading :)

love seeing the wonder on my kids faces as they explore creation