OpenDes, there is very little leeway allowed in choosing where to pay your tax. If you are English, working in Berlin (I guess) and being paid in euros to a bank in Germany, or even elsewhere in the world, you are obliged to pay taxes in the country where you 'derive the majority of your income'.
If you have been assessed as non-resident by the UK taxman then you should contact the local Finanzamt in Berlin and arrange to fill in a tax return there. Most, if not all, Germans employ a Tax accountant, who can work on a percentage or a fixed fee. They will work on your behalf to reduce your liability as much as is possible and in Germany, that can amount to quite a hefty refund each year.
You can claim some refund against your travel to work, your clothing, a room in your home as an office, all the equipment needed there such as fax, printer, computer, laptop, PDA etc. You can claim for things such as sunglasses, gloves, winter hat, all sorts of things. If you have a home in UK you will be allowed an allowance to maintain and visit that. However, you will still pay around 25% of your income in tax.
Talk to a tax accountant, (steurberater, in the phone book) and take the advice they give you. They will most certainly not advise you to stick your head even further in the sand and hope it will all go away. It won't.