Hello Henk,
Thank you for the light up.
FCL vol 3 has on page 55, FB233.
Derek Palmer's "Fighter Squadron" has on page 243, FB223
AB's FA100-FZ999 has
FB223 - 65 - force landed nr Potigny 27-7-44.
FB233 - 19 - S/d by Fw190s nr Dreux 20-6-44.
So Derek's is a typo error.
we all do them
Thanks Henk.
Alex