Originally Posted by intruder
It makes sense to alert Approach and/or Tower that you will autoland, so they can protect the ILS intrusion zones on the taxiways. If you don't, you may get undesirable excursions.
Originally Posted by ITCZ
Just make sure the ILS critical area (as we call it here) is protected.
In the UK, if you tell the TWR that you will be doing a practice autoland you are likely to simply be told that the ILS Sensitive Area is not protected. It is usually just not possible or practical to provide the protection that is required to support an actual CATII/III approach for a single aircraft in good wx.