Thank you guys for the invaluable input.

My feeling was that ailerons were taped quite frequently. That is why I did it on my model - in the photo of my example the upper wing is not clearly visible, so I assumed they were together with the wing.
Additionally, it is most probable that that plane serving in 8. Squadron was assembled from pieces - the left aileron is certainly coming from another aircraft as indicated by the misaligned cross. So, I feel anything was possible - even the taped ailerons.
On the other end - I am debating if I should add the tape around the elevator... Any hints here?