This will depend on whether you are the holder of an Air Transport or Operating Licence. Operators of such aircraft are required to demonstrate compliance at all times under the terms of that Licence – For further information see Airline Licensing.
Otherwise —insurance documentation will be routinely checked each time an aircraft is registered, either at the time of first entry on the UK Register or when there is a change of registered ownership. Additionally, a number of aircraft owners will be requested to produce evidence of insurance on a “rolling audit” basis and also through physical inspections at airfields. Note however it is for the operator of an aircraft to ensure compliance with the Regulation at all times. To knowingly operate without sufficient cover is an offence under the Civil Aviation (insurance) Regulations 2005 - Statutory Instrument No 1089 2005.
The CAA will normally consider evidence of insurance, and therefore compliance with the Regulation, on the basis of the exchange rate between Sterling and the SDR in place at the inception of the policy. However, owners and operators need to be aware that it is their responsibility to ensure that adequate cover exists for each and every flight. If owners or operators have concerns over their level of cover they should contact their broker for advice.
If you wish to supply evidence of insurance directly to the CAA ahead of any request to do so please either fax, post or email a copy of your certificate of insurance to the Aircraft Registration section.
For the purposes of monitoring compliance with the regulation, for aircraft that are not operated by an Operating Licence Holder, the CAA's aim is to verify insurance at least every three to four years.