Hi, I have just had to remove the bumper on my 211 Estate for sorting out a towbar. To do this I followed the instructions from the Tow Trust website which I have appended here for your particular vehicle. I think the only difficulty was separating the fittings on the parking sensors, and then finding some where safe to put the bumper.
(Four fixings along rear panel, two fixings on wheel arch, two fixings on
lower edge and two bolts each side behind boot side panels).