Just to mention I'm not linked to Seastart........
Prices from thier website are ;
Under 23ft (7.01m) Single engine CC = £139.99 DD =£134.99
Over 23ft (7.01m) single engine £149.99 £144.99
Over 23ft (7.01m) twin engine £159.99 £154.99
For me more peace of mind if I'm out with the kids - rather pay this than call the lifeboat out ( assuming its not a dramatic situation - when yes the lifeboat would be welcome ) .
Interested to get views from others on experiance - my only time was a non-start on the mooring & they were very helpful on the phone ( talking through possible probs & in person.)