Just further to our CAR's, the interpretation put on our "over 60" rule is that there is no restriction when flying what we refer to as "aerial work" (filming, photography, fire fighting, sling loads, etc) as they do not carry "passengers". All on board must be essential to the operation, and therefore crew, not pax.
For passenger carrying ops, ie Charter, as long as you have an annual proficiency test 60 - 65, or a six monthly proficiency test once past 65, you can legally fly pax without a sub 60 co-pilot. Even Nigel can keep flying