Furthermore, I've read that their trade spread from North America to the Middle East. With that in mind what was the relationship like between regional and long-distance systems in relation to Britain?
For example, I'm assuming Vikings wouldn't sail all the way from, say, Dublin to Baghdad even though there's evidence in a number of hoards that they were connected somehow.
With regards to England, a particularly lucrative trade network develops across the Irish Sea between Hiberno-Norse settlements at sites like Dublin, Wexford and Waterford, and the English ports at Bristol and, most importantly, Chester. Among Bristol's chief trades is likely to have been the exportation of Welsh slaves to Ireland, while Irish slaves are likely to have been imported to Chester, as a result of the nuances of alliances and rivalries between Wessex, Mercia and various Welsh kingdoms.
The trade at Chester seems to have been particularly extensive, as evidenced by the vast array of Chester-minted English pennies found at Hiberno-Norse sites and on the Isle of Man. The various types and dates of coinages suggest that these multiple hoards were traders' stockpiles and reserves. English silver coinage was highly regarded and retained its value well.
That so much English coinage ends up in Ireland suggests that the English were importing large amounts through Chester. Besides slaves, this may have been raw silver, also imported from Wales, ores, and cattle. Mercia in the 10th Century is largely aceramic in culture, so ceramics don't appear to have been traded much in either direction. In return, the English may have exported metalwork, worked silver, wool and fabrics.