These details are what UKRA currently understands to be correct however we have not had these checked by a lawyer or the HSE.
After years of discussions between UKRA and the HSE, most rocketeers now require very little paperwork. All model, mid and even some smaller high powered engines can now be purchased without an Explosives Licence, just an RCA is required for transportation purposes.
Rocketeers who wish to purchase larger motors (from about mid K) or store a large amount of motors or black powder, or those not on the list of exempted motors will still require paperwork.
The law in summary states that any person over the age of 18 is allowed to purchase and store a combined total of 5kg of explosives if that explosive is contained within a list of exemptions and each motor being less than 1Kg net propellant. Please note that with regard rocket motors the weight is the net propellant weight and not the gross weight which will include packaging. If you do not know the net propellant weight, then the law states that you must assume one quarter of the product weight is propellant.
The following UN numbers are listed under the exemption - 0186, 0272, 0349, 0351 and 0471.
If you do not meet the criteria above then you will need to get an Explosives Licence and an RCA. You will need to fill in an ER1 form which you can obtain by contacting your local police firearms division, once you have your Explosive licence you can then fax it to the HSE to get the appropriate RCA.
An RCA is also required for those who will be transporting motors covered by the exemptions (i.e. between your home and the launches). The HSE prepared a template letter in Word format for Rocketeers to apply to move their model rocket motors. The completed letter can be sent by email to email@example.com or by post to the address on the letter.
The letter includes all the information for the exempted motors and also includes UN numbers for other common items that are exempt from the need for an explosives license e.g. quickmatch, igniters, Estes motors and PIC.
The full details of the requirements can be found in the S.I. 1638 - Explosives Regulations 2014.
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