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Born c1770.
1841 UK Census for Thorn Cottage, Holloway shown as of independent means aged 70 years.
Died 1848.
England & Wales Deaths Index for Islington register dated 1st quarter 1848.
For further detail of the Lias business see John Culme's Directory of Gold & Silversmiths 1838-1914 Vol. I p.295-6.
The Will of John Lias, silversmith late of Finsbury Street, was proved for probate on 22nd March 1848 (National Archives reference PROB 11/2071/289).

28 July 1804 John Lias Saint Lukes Old Street Middlesex Working Silver Smith paid apprentice indenture duty for James Berry.

Recorded as a Silversmith & Jeweller of 8, Finsbury Street, Chiswell Street.

Source: Johnstone's London Commercial Guide - Corrected to 31st August 1817 - Andrew Johnstone - 1818

Information from an eBay listing

"In 1818 he appointed his son Henry [John] Lias as his partner and the two worked together until 1879 when Henry Lias joined James Wakely in commissioning a firm which later was called Wakely & Wheeler in 1909. Approximately half of a century later, in 1957, the business merged with Padgett & Braham Ltd."

Notice is hereby given that the Partnership lately carried on by us, as Silversmiths, in Finsbury-street, Chiswell-street, in the parish of Saint Luke,
Old-street, in the county of Middlesex, under the firm of John Lias and Son, was, on the 29th day of September last, dissolved by mutual consent.;—Dated the 11th day of October 1841.
John Lias.
Henry John Lias.

Source: The London Gazette - 15th October 1841