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Speaking to ATG, Upham said the trade “should not be afraid to approach us in whatever way is appropriate for them. We can be discreet.

“We are always willing to listen and are receptive to any approach as well as willing to act on any information they provide.”

ATG digital subscribers can read our full interview with Rob Upham on topics including thefts, fakes, looted art and future plans of the Met Police’s art and antiques unit.