GBP/doc
From Halal Explorer
< Template:GBPTo display a monetary value and see in other currencies on mouseover {{GBP|2}} will give you : <abbr title="£2 ≈ US$Expression error: Unexpected < operator.–Expression error: Unexpected < operator., €Expression error: Unexpected < operator.–Expression error: Unexpected < operator., JP¥Expression error: Unexpected < operator.–Expression error: Unexpected < operator.">£2
To see and edit exchange rates go to Template:Exchangerate/list and click on the link for the currency combination.