On Lancs OPC the baptism shows;
Robert Lomas son of Catherine Lomas of Haydock Street
Born 20 Feb Baptised: 2 Mar 1890 St Elphin, Warrington, Lancashire
Page 167, Entry 1332
The only way of finding where the baby was actually born though is by obtaining the birth certificate. Clearly by the date of the baptism they were living in Haydock St - presumably Warrington.