Hi Guus and welcome
To rout a bullnose like that I know 3 ways of doing it. First if it is a small enough diameter (up to 5/8in or 16mm) then it is possible to do it in a single pass with a cutter like these
and a deep wooden fence on the router. Problem is that they only go up to 1-1/4in or 32mm thick. Thicker that that and you need to go to a round-over bit with a bearing. George Tsu does these up to 1-1/2in radius
, but they are extremely large cutters, so not to be used without circumspection. The bearing will allow you to make the first cut, but for the second you'll need to use a fence because running against the bearing will introduce a step into the profile on true bull noses. The third approach, used on solid surface cutters, is to make the cut using a cutter with a special radiused bearing such as these
(look for "Corner rounding bits w/radius bearing, 2-flutes") which means that you can dispense with the fence
A note of caution: ALL of the above cutters are very large. they require a router with a speed adjustment capable of running them at about 8,000 rpm. On safety grounds I'd advise that the router be wired through a DoL (magnetic) starter so that it can be killed instantly should a problem occur. Finally if at all possible these cutters should be used with the router mounted in a table - freehand use is hazardous and requires an extra deep sub base to be installed on the router and a special fence plate to be made-up as the cutters are too big for the openings in the base of the router and the fence
BTW which London are you from?