I fly that plane and I can (far too frequently!) be found down in Terryrife.
When I first saw that picture I thought it was fake - a picture taken on the ground with the outside superimposed. However...
Whilst the screens can be dimmed, this isn't the case in the photo. The majority of photos that you take of the cockpit result in the displays being black like that - don't ask me why, but is almost always the case in bright conditions.
You can see from the MCP (autopilot panel) that the aircraft is configured for the ILS (get the chart here -
http://homepages.nildram.co.uk/~chrismox/GCTS.pdf) although whether or not the autopilot is engaged or whether they're just using the flight directors and flying manually isn't initially obvious...
The far-left and far-right displays would be the only way of telling if the autopilot was active once on a glideslope, and they obviously can't be seen.
The MCP shows both course indicators and the heading bug aligned to the ILS. It also has the go-around altitude in the altitude window which is standard after glideslope capture. Finally, the speed is set at 145 which is a fairly usual speed for an '800 - landing speeds are artificially high to prevent tail-strikes due to the long body length.
So, the one giveaway that they're hand-flying rather than using the automatics is that the autothrottle is disengaged (little switch on the autopilot panel). Whilst the autopilot can be engaged without using autothrottle, it's very rare - I've only ever not used it in gusty conditions when the autothrottle has a habit of violently chasing the speed and is therefore not very comfortable.
Finally, VFR flight in jets is fairly common, although almost always within controlled airspace. It's a common option to cancel IFR and continue with a visual approach - often saves a lot of time and, above all, is far more fun!