At CDG today the lounge was refusing refreshment vouchers on the basis that 'you can eat in the lounge'. This should mean deli bags before boarding if the web site is correct.
For flights to Heathrow, a deli-bag or a catering voucher (varies by airport) is available in the terminal for you to collect and use prior to boarding

Update - No Deli bags and crew said that I should have been given a voucher.

So BEWARE - flying from CDG - do not let the BA lounge staff lie to you.