HI, I haven't posted in here in ages, so hello again

I'm currently registered with the London assay office to which I post my packets, but my husband is looking at moving jobs soon to Birmingham and will be quite close to the jewellery quarter. So I was thinking it might make sense to change assay offices so that I can send the stuff with him and save on postage. Has anyone done this? Is it a case of paying for a new registration and a new punch to be made or is there some way of transferring the punch over? I had a look on both assay office's websites but couldn't see anything, so will probably email them, but thought I'd ask here in the meantime. The prices look comparable but Birmingham charge extra to set up laser marking which is a bit annoying.

Thanks for any advice