Your scam membership fees are tax deductible as far as I know - as are "trade magazine" subscriptions and "entertainment" so get receipts for your hobby magazines & newspapers etc. & get receipts from the pub - you WERE entertaining a potential client weren't you?
Clothing too - you needed that suit, shirt, tie & new shoes for business meetings didn't you? It was just fortunate that you had them to wear for that wedding you attended - and socks and underwear too can be construed as "workwear" - you DO wear socks & underpants when you go out to work don't you?
That carpet you bought for the child's bedroom was "really" for the spare room you use for your office wasn't it? Same for the paint & wallpaper etc .....
A percentage of what your lass spends on washing powder & cleaning materials too - you need to have your work wear cleaned and your office too. And of course you need a cleaner to do these tasks - show some payments to your lass for this.
Travelling expenses can be claimed too, so start collecting bus tickets. Sometimes it's not practical to use your car / van to attend business meetings is it?
When in doubt, claim for it. Your accountant can work out which box to tick for it.
In my early days of business, my accountant was an ex-Inland Revenue bloke & by God was he sharp!! I hardly ever paid tax & often got rebates - the largest being £1,200.