Thanks to everyone who replied.
The info I've got from the web re the Lark Lane church:
Sefton Park Presbyterian Church TOXTETH L17 4JB. Aigburth Drive, near corner with Lark Lane (this is on the south side of the park). Est: 1875,
burnt down 1919, rebuilt 1924, closed & demolished 1979/80. Some of these dates are similar to the Brompton Av. church.
It must have existed. The key is which one burnt down in 1919?
However I'm now pretty certain that it was the Bromptain Av. church that Alderman John Lea went to. He was not short of a bob or two, and would fit in well with the congregation as described, and he has been called a Scottish Presbyterian and the church had 'a strong Scottish influence'.
The Lark Lane church was a red herring

In 1881 John Lea is living with wife Isabella Mclaren (Evans) in the house of her sister Emily Bannerman Evans at Rydal House, St. Agnes Rd., Huyton (opposite Macgoldrick Park).
There was another sister Jane Campbell Evans. Their father Richard Evans married a scotswoman Jane Young, and the Perths. Youngs had previously married into the Mclarens (also from Perths.), Bannermans, & Campbells. The Evans's (Richard Evans & Co.) were heavily into Cheshire Salt & St. Helens coal, & wealthy.
I've now got a stack of info. on John Lea. (He was by a long shot the most interesting of my ancesters) and I'm supposed to be collating it into a 'paper'. I could put it on this forum but it's already 2xA4 sides big!
Keep smiling
