The bidding starts 2H(weak) - P - 2N*, P - 3C*
There are now some questions about the flavour of OGUST.
The bidding continues P - P! Short pause, 'Oops!' (before anyone else has bid, and euphemism!)
Law 25A taken in isolation allows the bidder to change to 3H (which was presumably the intended call)
And that seems "fair".
But Law 25B differentiates between mechanical errors (it wasn't) and loss of concentration (clearly!)
But does this aspect of Law 25B only apply 'If the players original intent was to make the call selected'?
On the one hand, as the phrase lies in 25B that seems to be the case.
But on the other if the 'intent was to make the call selected', how can there be need to change the call?
Ie the phrase cannot really apply to the circumstance of 25B.