Fenwick & West sees buoyant California venture capital prices while Nesta reports on narrowing performance gap between UK and US.

Fenwick & West, a US-based law firm, has seen the seventh month of increases to its barometer of venture capital-backed companies raising money in the San Francisco Bay Area while a separate report revealed narrowing differences between American and British start-ups.

Fenwick said 67% of the 122 companies raising money in the Bay Area in the first three months of the year showed increased valuations, versus 16% with so-called down rounds (17% were flat).

The average price increase was…