I can only give you my experience as to this predicament, I have been a Police officer for the last 15+ years, 7 years in Thames Valley and from 2004 to present 8+ years with Toronto Police in Canada. I have a varied background with experience in front line obviously as that is the most important job, then Ive carried out various deployments with investigative and finally Tactical.
Last year, my wife was very homesick and wished to return to the UK. I didnt want to but we do what ever we need to for family, I contacted numerous services in the UK and all of them stated I would have to bcome a new recruit, which was fine but were not recruiting and had no idea when it would open again.
One service checked my application email and resume and contacted me to complete a full transferee application, I did this, confirming with them a few times I had been out of a Home Office force for over 5 years, but they stated that was fine and requested me to continue the application, so I then spent a few thousand flying back to UK and completeing all required tests and interviews, after a few days I was informed that I had failed the vetting portion of the application!! They sent me a link to the home office rules and I read them numerous times, the only part is that I have been out over 5 years!! funny that after telling them over and over again!
So after all of this, I was out of pocket by around $3500 and no explanation from anyone in recruitment as to real reson why! I believe that somebody made a huge mistake and continued my app, I would rather someone would cough up and admit their mistake, we are all human after all!
I also contacted my old service Thames Valley and was told that I would never be eligible as I dont have the required educational background!! i.e. 2 x A levels. Even though I served for 7 years with them, they would not recruit me as a Constable!! Dont care about experience etc.
Any way, thats my little bad story but dont let that stop you, recruitment will open again eventually, but just do the best in all testa, dont just pass, pass as high as you can, do not give them any reason to stop you from joining. Once in and able to speak to actual officers and senior officers, then your background will have meaning, unfortunately recruitment is mainly conducted by staff who just use the guidelines as a bible and all common sense leaves the process.
Met have been recruiting and Thames valley are at the moment, another one is SOCA or the new NCA. Check out the websites.
There are various webites which give you online links to all home office and non home offices services. Dont worry about my tales, just nice to have a rant now and again and explain it is not all plain sailing, and be prepared for idiocy beyond belief but you will get there eventually.
Best of luck sir and stay safe