Hi there studentlearner, and welcome to ECN.
I'll take your question as an opportunity to re-post some images of British apparatus to give you an idea.
Compared to the U.S., final distribution here tends to have a smaller number of larger transformers. Like Ireland, Britain also has sub-stations in towns and villages, with a 3-phase 4-wire distribution network at 240/415V. The majority of homes take just a 2-wire 240V feed from this system.
Here's what a typical small sub-station looks like from the outside:
And here's the apparatus within:
In rural areas, or the edge of town where a group of houses stand on their own, you might see a 3-phase pole transformer, like this one:
Single-phase transformers are normally found only in rural areas where just one or two houses need to be fed:
[This message has been edited by pauluk (edited 08-19-2003).]