If they do give you your P45 before you hand the uniform back try this.
Individually stuff each item of clothing into separate envelopes/jiffy bags and address them but DON’T put postage on them when you stick them in a postbox. When they receive the post they will have to pay to receive it or even have to send someone to the post office to pay for and collect them.
Just an idea

What they really have done is to have a formal leaving meeting to get the uniform from you and hand over the P45 and any moneys due. That makes for a clean break. Any fool can see that buckshee uniforms floating around are a security risk. Don’t be an idiot, give it back and leave with your reputation intact. Unless of course you have been fired.
ya do’nt need it mate,from personal experience they may of not been paying your tax and stamp and pocketing it (unless it’s a well established outfit),just go on emergency tax for a few weeks 
Uniform wasn’t an issue but an agency didn’t pass on my P45.
They got real snotty about the tacho charts that must have got mislaid at the same sorting office as my P45.
Always more than one way to skin a cat.
you have anything that belongs to the company they can withhold your final pay, as your still in possession of company uniform (even though You have finished with them) they can take the view that you are still under company policy and suspended without pay till the return of all property belonging to them or their agents ( any company you have work for through them). You would lose if they took the matter to court and you’d pay their costs.
Muckaway:
I got my P45 the other day, and just received a snotty text about having not given back my uniform. Thing is, old work is 20 mins drive one way, new job is 20 mins the other. I said at “exit interview” I’d give it back when passing. Surely I shouldn’t have to make special arrangements on my days off? One of their drivers leaves on Friday to come and work where I am, so will probably try and leave it and sort something between us.
I had a similar uniform situation with a major DIY store. They wanted me to fetch it back after we’d parted company on poor terms.
I wrote to them to say the uniform was at my home address and I would take all reasonable steps for them to come and collect it. They rang and said, no I should bring it to them. I wrote back saying they should make arrangements to come and collect. The onus was on them, not me to get it so there was no way I was going out of my way to help the half wits. They asked me to post it to them and I refused unless they gave me an up front bond of £50 to cover postage. I wrote back to say I didn’t trust them, particularly after they’d just shafted me.
They eventually turned up at my home address and I threw it onto the drive out of a bedroom window.
Petulant and childish? Absolutely, but after they’d shafted me I wasn’t going to go out of my way to help them.
On the subject of leaving, my old employment contract said those leaving employment cannot poach employees and customers for three months. An ex colleague’s starting for us on Monday (got to train him), and another’s considering applying for a job. Could my ex employer claim I “poached” new driver, or would this apply if I was a manager who’d approached him? All I did was give him a good reference after asking on his behalf.
Conor:
Kneal:
Has anyone else had their P45 held to ransom. I left my job about 3 weeks ago, after working 5 years for them. Ive just been informed that until I return my uniform, which I might add is faded and quite worn, I won’t be recieving my P45. Is it legal to withhold my P45
Turn round to them the next time they speak to you and say “No problem, I’ll just complete a P46 at my new employer.” The only thing not getting a P45 from your employer does is mean you pay a bit more tax for a few weeks until your new employer gets your tax code from HMRC and then you’re refunded the overpayment.
I will add though that technically by not giving them their property back you’ve stolen it and should they decide to get uppity about it they are within their rights to phone the Police.
+1
The last part is a grey area, I don’t think there was any intent in the first place to permanently deprive the bloke of there uniform. I stand corrected as the uniform was given to the OP it is not classed as theft
mick.mh2racing:
I had a similar uniform situation with a major DIY store. They wanted me to fetch it back after we’d parted company on poor terms.
I wrote to them to say the uniform was at my home address and I would take all reasonable steps for them to come and collect it. They rang and said, no I should bring it to them. I wrote back saying they should make arrangements to come and collect. The onus was on them, not me to get it so there was no way I was going out of my way to help the half wits. They asked me to post it to them and I refused unless they gave me an up front bond of £50 to cover postage. I wrote back to say I didn’t trust them, particularly after they’d just shafted me.
They eventually turned up at my home address and I threw it onto the drive out of a bedroom window.
Petulant and childish? Absolutely, but after they’d shafted me I wasn’t going to go out of my way to help them.
You should have done as they asked. Posted it back individually packed without any stamps.