For insomniacs, the ANO Part III section 17 (2) refers, and states:-
"The log books.... shall be of a type approved by the CAA"
It also adds in sub-section 4 "Any document which is incorporated by reference in a log book shall be deemed, for the purposes of this Order, to be part of the log book"
As most engineering firms now add a line at maintenance along the lines of "Work held on file at XYZ under file ref ABC", then if these are on a computer, you potentially have the solution - in the logbook add an entry along the lines of "Flight details held on system UVW in file DEF"
In any case, I an not a lawyer, so it looks like a call to Gatwick, on the basis there is nothing mentioned on the CAA website (sigh..)
IFR