For a substitution you need an FCA1 and use:

• Section 1 - Tick substitution, and "I have not held a cert............".
• Section 2 - All of it.
• Section 2.4 - All of it.
• Section 3.1 - Input the details of new gun here.
• Section 3.3 - Dealers details.
• Section 3.4 - Input your current firearm details here.
• Section 3.5 - All of it.
• Section 4.1 - All of it.
• Section 4.2 - All of it.
• Section 4.3 or 5.2 - Depending on whether you are a member of a range (4.3) or gun club (5.2).
• Section 5.1 - All of it.
• Sign and date it.

Include the 2 photos as some stations ask for it and others do not so better to be sure. Also fill in a seperate piece of paper with the extra information as required in certain sections.

Its becoming more and more common for certain districts to ask for almost all info to be filled in on the FCA1 even if only doing a sub. Best to fill them in, and send it off to prevent any returns looking for more info. The only things you definitely don't need are the doctor details, and referees.