Very quick response from my MP, Mark Prisk:
Thank you for your email about EDM 1155 and photography in public places.
I appreciate you drawing my attention to this issue, I am not aware that this practice is particularly prevalent, and as such I would not wish to sign the EDM and criticise our police force without knowing more details.
In general, however, I believe it is important that people are aware of what their rights are. You are right that, except in exceptional circumstances, it is not an offence to take photographs in public places, indeed, thousands of people do all through the UK every day.
When there are serious concerns about national security, such as at military airports and power stations, there are provisions for photography being restricted; however, in general Government buildings are not covered. Indeed, the Houses of Parliament must be one of the most photographed buildings in the world and, whilst the Metropolitan police are running an anti-terrorism campaign encouraging the reporting of suspicious behaviour, including photographing sensitive buildings, I am not aware that this has led to any harassment of photographers.
Once again, thank you for taking the time to write to me.
Yours sincerely
Mark Prisk MP
So, no luck there but at least he responded. I will send him some examples of press reports and people's presonal experiences, so if you know of any other than those already posted in this thread, please pass them on.
If you haven't writen to yours yet, get on the case!