Most Prunus (Laurel is Prunus laurocerasus)  have the extra-floral nectaries and these are found on the underside of the leaf along the midrib in the case of Laurel. More commonly they are found on the leaf petiole near the base of the leaf. I have seen wasps visiting laurel in the spring as well.

In this instance your photo does not show one the nectaries, but I think the dark spot is a scale insect. As with other sap sucking insects they do produce honeydew as a waste product (which still contains sugar) and this could also be attracting the bees.

The honeydew can also drip down on to the foliage below and you can get sooty mould growth on the leaves. As the name suggests this is a black powdery mould which can be fairly easily be rubbed off. The presence and extent of sooty mould growth could help indicate the severity of the scale insect infestation. Check under some more leaves and also the stems for more scales.

A severe infestation may need treating with a suitable systemic insecticide, though of course you must wait wait until the bees no longer visit the plant, or tolerate the scale. I don't know of an alternative treatment except to pick off affected leaves, which may be impracticable.

Regards Lucy