Note: This happened at my table last night but I was not in the hand. I already posted in the Official Chat thread, so if you've seen the hand and result, pls spoiler any results.

Deep-stack £1/2 game; effective stacks probably over £1000 except for one short stack Indian lady that had luckboxed into over £500 at one point and is now sitting on £50. Three or four limps to the Button, a winning reg, definitely capable of making moves but not really a gambool guy, now sitting on over £2K, who also limps. The Small Blind, tight, a bit passive, hasn't been very active, makes it £12. The short stack calls (?!), one more person in LP calls, and it gets to the Button who throws in two chips.

The dealer announces 'raise to £107', and the Button looks slightly confused, until he looks down and realizes he must have had a dirty stack, because there is now a £100 chip and a £5 chip across the line in front of him instead of two £5s.

At this point the Button goes, 'Totally being honest here, I was trying to call; I wasn't trying to raise'. FWIW, I (and the rest of the table) believe him; no way is this an angle.

The Small Blind is next to act. He has about £1000 or so, Button obviously covers. What does the SB do, and how does his best course of action change based on what he has?

Already posted once and non-strat.

Locked.