Alko bearings don’t need renewed unless there’s definite play. If they are warm, but not hot to touch after a journey they are fine. You can prize off the seal cap and dismantle, inspect and re-grease. The Alko fit once nuts, I’ve sourced from Taunton Trailers, nip up, back off slightly, then use a cold chisel to secure.
If you do a lot of miles each season and want peace of mind, then swap out the taper bearings and race. I didn’t use a press. Hammer and chisel carefully to remove. Use light mineral oil to lube and use oversized socket to hammer in. If you have access to a bench press, all the better.
Is that with or without VAT?