Buy and lease back vehicle?

[Artless Dodger]

Hi all....
Just needing a new van for my business, (sole trader) and wondering if, from a tax and legal standpoint, my other half can buy the van outright (great prices!) and then lease it back to me?
Would this be a good way of doing things, rather than writing it off over time?
If this is possible I take it I'd need a solicitor to draw up an agreement?

Hope you guys know something I don't, as I'm a bit confuzzled by all the options!