The motto of the city of Bristol is Virtute et Industria (Virtue and Industry).
However, one feature of Bristol’s local dialect is the addition of a final, intrusive ‘L’ – a so-called terminal L – to words ending in a vowel.
Consequently, area, say, becomes ‘areal‘, whilst Clifton’s Princess Victoria Street mutates into Princess Victorial Street, so Industria naturally becomes Industrial.
The terminal L is beautifully illustrated in Virtute et Industrial, a song written by Adge Cutler (posts passim), and sung here by the late Fred Wedlock.