National Statistics Online

How does GVA relate to GDP?
The link between GVA and GDP can be defined as:
GVA (at current basic prices; available by industry only)
plus taxes on products (available at whole economy level only)
less subsidies on products (available at whole economy level only)
equals GDP (at current market prices; available at whole economy level only).

Digging further, I find that the oil & gas contribution to the GDP was just £2.3 billion in 1998, it shan't be higher now (I found no newer data on that crappy site). At least the mining industry index was decreasing.

_{*Lunatic*, n.
One whose delusions are out of fashion.}