Here's a plate coin for an upcoming book. [Ken Elk's] book on the London mint is due out soon. I don't remember what it is called; but it is abbreviated RML, so I believe it is Roman Mint of London.
We will probably have too many references for London coins now. The book "London Mint of Constantius and Constantine" (LMCC) by Cloke and Toone has a 2nd edition coming out shortly.
Constantine I
A.D. 319
17mm 3.4g
CONSTANTINVS AVG; laureate helmeted and cuirassed bust right.
VICTORIAE LAETAE PRINC PERP; two Victories stg., facing one another, together holding shield/ wreath inscribed VOT PR on decorated altar.
In ex. PLN
RIC VII London 161; LMCC 9.01.011; RML 902 (plate coin)