Dogger Bank Wind Farm is a proposed group of offshore wind farms to be built on the Dogger Bank in the North Sea. It is being developed by the Forewind consortium. It is expected that the Dogger Bank development will consist of three or four offshore wind farms, each with a capacity of up to 1.2 gigaWatts. Planning consent for the project was granted by the UK government in 2015.
It expected that construction could begin in early 2020. Each wind farm will cost several billions of pounds. It is expected that the generated electricity will connect into the UK national grid in Yorkshire.
In a discussion of how offshore wind power can be developed in Europe, a document produced by Orsted shows the following comparison of the cost of various sources of electricity generation. It shows the dramatic fall in the cost of offshore electricity in the past six years.
There is talk about the electricity being used to generate hydrogen which could then be fed into the gas main. See for example this student thesis from Delft University of Technology.