I've tried to research the joint British-Dutch project to exchange the Sea dart system for the Dutch HSA SPS-01 multifunction radar system. Alas I have not been able to find any sketches or drawings or any other viable illustrations of how a Tromp armed with the Sea Dart may have looked like. I have come to the conclusion that it is due to the very fluid nature of the semi-official agreement reached in 1962 and then repealed two years later. There simply wasn't any incentive to start even sketching such vessels!
Now, however, since ace converted the original Tromp to his 1967 edition with Tartar, I have taken the liberty of using it to create three viable version of a Sea Dart armed Tromp. My drawings are in this perspective pure conjecture, but should still be termed 'never-built' designs since they are, in most respects, faithfully replicating what the Dutch later came to utilize on either the Tromps or the van Speijks. At one time there was a speculation whether the Dutch would go with the Ikara system, since the British at the time were designing the Bristol-class of six destroyers (of which only the Bristol herself ever materialized!) I've also speculated in a Sea Wolf version, which, albeith the fact that it wasn't operational at the time of the design, nevertheless come into service around 1972, when the Tromps would have been laid down, and thus can be regarded as a viable alternative to the Sea Sparrow system ultimately adopted. The last version is for a simple Sea Cat system with two quad launchers instead of the Sea Sparrow. There are no indication that the Dutch ever planned to arm their new flagships with this, but it was purchased by them for arming the van Speijks, so I have included it here as a comparision. For the concept ship I've reverted to the oblong, drop-formed funnel as seen in the original sketch and I have provided the ship with additional British-made electronic equipments.
Without further ado; here is version one: Sea Dart and Ikara:
Version two: Sea Dart and Sea Wolf:
Version three: Sea Dart and Sea Cat: