The 3 take-offs and landings in 90 days is only required to carry passengers. If you are uncurrent and want to go for a jolly by yourself then go for it.(helps to do those 3 circuits thou just in case you get a short notice request for a ride by friends etc.)
Of course this really works well when you are the aircraft owner. If you're hiring the a/c trough a club or school they may have their own requirements in excess of CAA's rules.
CB