The change is needed because of cases like this one:
The change will open speculation for claims for other works in UK institutions that may have been taken under less-than-appropriate circumstances—like the Parthenon marbles, the Benin bronzes, the Rosetta stone, or the Lewis chessmen. As such the legislation is limited to "objects stolen between 1933 and 1945 by the Nazi regime". Though the legislation is sharply focused on a narrow historical period, one wonders why only those objects are left open for restitutions when the others are not. The Second World War was a special circumstance perhaps, but its not clear how that historical period is different from other conflicts.
When the Germans invaded Czechoslovakia in 1939, the Feldmanns were evicted from their home, leaving a collection of Old Master drawings in Gestapo hands. Arthur died after being tortured by the Nazis in the Spilberk Castle prison in his home city of Brno. Gisela died in Auschwitz.
With the help of the London-based Commission for Looted Art in Europe, Feldmann's descendants proved that four of his drawings had ended up in the British Museum. The museum was prepared to return them to the family but was blocked by a high court judge. Instead the family negotiated a deal, including an ex-gratia payment of £175,000, that allows the drawings to remain in London.
Feldmann's grandson Uri Peled, 66, who lives in Israel, said that although he did not wish to have the items returned, the principle of the bill - allowing the rightful owner to make the decision about what to do with their art - was important.