[SpecB]

Taken from the AA site:

January 2013 - the French government announced that the implementation of the sanction for drivers not carrying a breathalyser – a fine of €11 – has been postponed indefinitely.

So theoretically you are still required to carry a self-test breathalyser when driving in France but there is no current legislation demanding a fine for non-compliance.

While radar speed camera detectors may still be legal at home – the 2006 Road Safety Act did include enabling provisions allowing the Secretary of State to make regulations to prohibit them but this hasn't been done yet – the position is different abroad where many countries have laws in place banning the carrying or use of these devices.
For some years now it is has been strictly forbidden under article R413-15 of the French 'Code de la Route' (highway code) to have a speed camera detector in a car in France, regardless of whether or not it is being used.
Penalties can include fines of up to €1,500, confiscation of the device and of the vehicle.
Until recently this legislation didn't apply to satellite navigation or other GPS-based systems capable of displaying fixed speed camera locations as points of interest (PoI).
New law in France
Effective from 3 January 2012 French laws prohibiting drivers from carrying devices capable of detecting speed cameras have been extended to include devices able to warn or inform of the location of speed cameras e.g. satnav or gps systems capable of showing speed camera sites as PoI.

As well as now banning all devices capable of warning drivers of speed camera locations, the French government is installing around 400 new fixed speed cameras and is taking down road signs indicating the location of existing fixed speed camera sites.