takeover mechanics

Something my broker didn't seem to be able to answer this morning...

I've got half my holding with each of two brokers... Holding with one broker is accepted already... The other I'm holding off for a bit.

What I'm wondering... is if INR decides they have to increase their offer to get the necessary numbers. Do the shareholders that have already accepted get the better offer or are they stuck with what they've already accepted?

Given the apparently dismal number of acceptances they have recieved I'm thinking that raising the offer may be a possibility.