I can give a bit of background to Tierney Cycles. As Classic33 rightly said, they were on Aigburth Road, Liverpool. I actually had a Saturday job working in the shop around 1978, and earned enough money to pay for my first custom made frame, built by Norman Tierney himself. I'd say that Mickthepump's frame is similar vintage to mine judging by the decals and the braze ons, so late 70s. The shop itself opened in 1977 (I remember that because it's the year the Milk Race held a stage in nearby Sefton Park, and Norman hadn't long been open.
Sorry to hear of Norman's passing, he was a nice bloke and was good to work for.
I no longer have my frame - it actually emigrated with me to Australia, and up to about 15 years ago I still had it - wish I'd kept it!