The tax implications, from a UK point of view, are capital gains tax and stamp duty land tax.
If the house were your sole or principal residence, then the chances are that in England it would not be subject to CGT.
A transfer of your half share in England pursuant to a Court order is not subject to stamp duty ; but a Court order can''t come into effect until Decree Absolute, so in England transferring the property before the order risks losing the benefit of this exemption.
But this property is in France and really, nobody on wiki can advise about that. I seem to recall reading something that in France duties payable by reference to transfer of property were much higher than they were in England.
As far as England and Wales are concerned, I think you should not transfer property in anticipation of the order. But France - well, sorry, I don''t know but it would be worth taking advice. I would have thought it a very high probability that a transfer of property in France would be subject to French law and, sorry, we don''t do French law here.