Microsoft Word Expert needed for alignment issue

I need to create a word letter template that looks like the attached PDF. I have started the word template - see attached letterhead.

I've used a table to make the alignment easy in the bottom right hand corner but I'm struggling to make another table with the company reg details in the bottom left hand corner that aligns nicely with the bottom right hand corner.

I'm not a word expert but an InDesgin expert.

It would be great to get this done by tomorrow afternoon.