That penny is the bronze penny from 1891. There were about 18,000,000 minted. It should weight 8.8g. It's valued at $3 to $175
depending on the grade and condition. If you have a proof coin, it's worth about $850.
I did find some dealers in the Glasgow area. The list isn't too big. There are a few little shops, but go-to's seem to be:
A.D. Hamilton & Co.
7 St. Vincent Place, Glasgow G1 2DW
Tel: 0141-221-5423 Fax: 0141-248-6019
Argyll Coins & Antiques
73 Robertson Street, Glasgow, Lanarkshire, G2 8QD
Tel: 0141(NNN) NNN-NNNN
This might possibly be a bit out of your area, but:
Edinburgh Coin Shop
11, West Crosscauseway, Edinburgh, EH8 9JW
Tel: 0131(NNN) NNN-NNNN& 0131(NNN) NNN-NNNNFax: 0131(NNN) NNN-NNNNbr/>
The majority of the higher-end shops are in the London area, but I didn't figure you wanted to travel that far. =)
Thanks and I hope you have a great day.