Get a free for 18 months business account as a sole trader with (for instance) HSBC.
PAY ALL THE CHEQUES INTO THERE.
18 months later, when the deal runs out. Swap it to a joint account for another 18 months free.
Then walk away and into...Nat West. Same there.
That's 6 years of free cheques going in.
Try that with as many banks as you can.
BACS it over to your main acct whenever you like.