Gill Sans Infant  Suggested by akira1975 
Gill Sans Nova  Suggested by akira1975 

Gill Sans Infant looks very close, though the lowercase l doesn’t match.
https://www.myfonts.com/collections/gill-sans-infant-font-monotype-imaging

Gill Sans Nova includes a single-storey a and a single-storey g in the font.
https://www.myfonts.com/collections/gill-sans-nova-font-monotype-imaging

Thanks!
(Does this mean that Gill sans nova is an approximation....?)

Gill Sans Nova has alternate a’s and alternate g’s.
See the glyph map:
https://www.myfonts.com/collections/gill-sans-nova-font-monotype-imaging?tab=glyphs

Thanks!
It seems that Gill Sans Nova is closer to this due to the alternate [a],[g] and the shape of the [l].