According to Thinkbroadband (http://labs.thinkbroadband.com/local/england), 96.8% of premises in Birmingham Northfield constituency currently have access to Superfast Broadband. Similarly, 96.8% of premises in the city of Birmingham has access to Superfast broadband.
The West Midlands area is slightly higher with 97% of premises having this access. This is up from 60% in 2010. All three areas currently sit above the UK average.