New visa fees effective from April 2016

The Home Office is planning to increase visa fees up to 25% increases for settlement, nationality fees, Tier 1 Entrepreneur, Tier 1 Investor, spouse visas and up to 33% for optional premium services offered by the Home Office such as the super premium service and priority visa services overseas.

https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/503658
/Fees_table_18_March_2016_PDF.pdf

Source: UK Border Agency: