BEST SPECIAL FORCES
The poll author does not realise that the so called Royal Navy Special Boat Squadron does not in fact exist. The Special boat squadron(now called service) is a integral part of the Corps of Royal Marines and is only company strenth. The Royal Marines are also a integral part of the Royal Navy though with military rank insignia.
The Poll Authors option of selecting SBS is valid because they are Special Forces even though they are part of the Royal Marines and not an independent regiment like the SAS.