Be aware that if there are others also wishing to speak in objection, you will have to carve up the three minutes amongst yourselves beforehand.
When the chair calls for an objector to speak, it is vital to indicate your intention to speak straight away as you will not be able to contribute after this point if you don't say so at that point, especially if there are multiple objectors.
After the three minute presentation the councillors will be able to ask you questions - and if it is obvious that you haven't covered all the points you wished to make then one of them will often (but not always) ask a helpful general question like 'was there anything else you wanted to say?' so that any issues not fully addressed during the three minutes get aired before the decision is made.
It is also possible for several people to come to the top table when objectors are called, then for one person to speak for three minutes and several others to be on hand to answer questions from councillors.
Thanks for the info. It is nice to know what will happen on the night.
Also thanks for telling me that the councillors may ask if there is anything else I would like to say. When I heard about the three minute rule my first thought was how do I get across what I want to say in such a short time.
It may help noting down your main points in bullet points as I for one would forget half of what I wanted to say originally in the heat of the moment.
As it's planning make sure the points you're objecting about are not in keeping with planning guidelines etc. or and a detrimental effect on the area etc.
It may be worth making further bullet points why this development is so bad etc. and it's consequences as the Councillors might ask you a number of questions after your three minutes. The better you're prepared the more successful you will be.
Some time ago I was advise to show up about 15 minutes before the meeting starts - like this you have a chance to figure out if anyone else is wishing to speak.
The points you make should be "material" i.e. not a moan about loss of view, the effect of development on the value of your home or general grumbles.
You can distribute photos, or drawings to the committee in support of your case.
The planning process is designed to encourage development, with protection for light &c, not stop developments, 'coz they are unpopular. Try contacting the cllrs before the meeting, to let them know you will be opposing, don't expect them to commit to supporting you, as that will bar them from taking part. Ask a cllr to use his/her three minutes to speak against the proposal.
Makes sense to go into the meeting prepared. Bullet points do sound like a good idea. I am sure that standing there most of what you wanted to say would probably go out of your mind.
I see that there is another council meeting (for a different area of Southwark) on the 6th (the night before the one that I intend to be at), so I am going to go along to that and see what happens there. It might give me some pointers.