Hello, and good timing. I'm in exactly the same situation (although my CPL ME IR comes from South Africa).
I have recently taken in a lot of information that I'm still digesting myself, so I'll try to be brief AND clear. I have had a job out of flight school, but it didn't give me many hours, especially because of the pandemic, so I am a low-hour pilot as well.
If your CPL or ATPL theory subjects are EASA then that's fine, you can carry them over. If they are not, then you will need to either a. get theory credit from the CAA you're looking to get your CPL from, or b. if this is not possible, write theory again (I doubt this is the case for UK CAA theory).
For the practical part, this is where it gets a little complicated on whom you ask. Transport Malta - Civil Aviation Directorate will require you to do a minimum amount of hours BEFORE passing your EASA skilltest (see PEL notice No 80, version 2, page 3).
I'll copy-paste a part of it
After completion of CPL (A) or ATPL(A) exams, the applicant will need to complete the minimum flying requirements shown below at an Approved Training Organisation approved to conduct CPL modular course. Minimum instruction depending upon total hours as an aeroplane pilot:
• Level 1: Experience > 1000 hrs: Min 7 hrs (18 hrs credit) • Level 2: Experience 500 - 999 hrs: Min 10 hrs (15 hrs credit) • Level 3: Experience 250 - 499 hrs: Min 15 hrs (10 hrs credit) • Level 4: Experience 185 - 249 hrs: Min 20 hrs (5 hrs credit) • Level 5: Experience 155 - 184 hrs: Min 25 hrs (no credit)
Pass the Part-FCL CPL (A) Skill Test.
Similarly, some other CAAs (e.g. German LBA) will require a minimum
of 15 hours instruction (in my case) before passing the skill test. Of these, up to 6 can be in an FSTD, and a minimum of 5 MUST be in MEP. Some ATOs will allow me to do the remaining 4 in SEP, which lowers the cost. ALL of this time can be IFR as well, so I can combine the MEP and IR phases into one combined phase.
There are plenty of people with A LOT more experience and knowledge than me, so I will give them a chance to reply. Besides I'm still sorting out the rest of the info in my own head, I don't want to confuse you or tell you stuff that isn't correct. My advice would be to get in touch with ATOs from different CAAs and tell them something like this:
You have a CPL SEP MEP ME IR (I assume, season to taste of course). You want an EASA SEP MEP ME IR. You would like to transfer your EASA theory (if not possible, do theory examas) and then do a reduced CPL (because you already have training), reduced SEP, reduced MEP, reduced IR.
Go from there and see what they say.
Several people have told me that an ATO asking you to convert your CPL / ATPL to their local PPL and then do modular all the way up to a CPL again either a. are scamming, or b. aren't sure how to handle a conversion, so they're going the "safe" route so as not to get into trouble with their CAA. Obviously, if you're doing a modular CPL it's going to be more expensive than just 5 - 15 hours.
EU Aircrew Regulation / Appendix 3 to Part-FCL / B. ATP modular course - Aeroplanes / 1. Applicants for an ATPL (A) Source:
EU Aircrew Regulation / Appendix 3 to Part-FCL / E. CPL modular course - Aeroplanes (says you need to hold a PPL (A) issued in accordance with Annex 1 to the Chicago Convention before you can enroll. Makes no mention of EU, EASA, EEZ, etc.
Also, some Scandinavian ATOs and a few French ones are asking me for an assessment flight before drawing up a training plan. This can be good, because based on your experience (especially if fresh), they will propose to their CAA a reduction in flight training. It may get approved or amended, but they can also draw up a training plan that looks just like what you find elsewhere (or more).
Hope that helps, good luck. I'll let you know as I find more interesting information.