Frith and Co were a firm of photographers and publishers based in Reigate: they produced postcards showing scenes from all round the British Isles .  Frith's cards were produced around the same time as the "Peacock" series, from around 1905 to 1918, and the series seem to be interchangeable.  The numbers used are identical across the two series on cards seen to date.
AYCLQ56 2709
Alderney, Clonque Bay
AYCRA52 2713P
Alderney, Crabby Village
AYTEL51 2716P
Alderney, Telegraph Bay