Thanks all!
So the Steampacket was definitely originally the Stanley. I have found some info on the Stanley:
Nos. 68 & 70 Mostyn Street - Including Former Stanley Hotel, LlandudnoTwo terraced houses of about 1865 on Llandudno's most prestigious shopping street. The houses are depicted on the OS 1:500 Town Plan of 1889, when No. 70 was the 'Stanley Hotel'. Now shops with accommodation above.
Three storey buildings with basements and attics, under a common slate gabled roof. They present two bay stuccoed facades to Mostyn Street. The ground floors have modern shop fronts and the first floors each have a bay window. The attics are lit by gabled dormers.
The houses were originally two rooms deep with lateral stairs and corridors. There were service ranges and outbuildings to the rear. The ground floor retail premises have been extended through, as have the basements.
Source: CADW Listed Buildings Database (25313, 25321)