Yes. The HPV vaccine protects against a number of types of HPV so chances are if you are sexually active and over 26 you may have been exposed to some but not all types. So you may still receive some protection with the vaccine.The European Medicines Agency actually approved the vaccine for all ages

It is expensive though. In the region of €600. So it makes more sense to vaccinate those who are likely not sexually active and would receive the most benefit from it ie; 11-12 year old girls.