Not really sure how/if the new treatment of loan interest is effecting anything.

Just filled out my tax form and to be honest theres no difference whatsoever in the final tax calculation. you can test this out for yourselves by putting the whole interest in the interest costs box and let the system do the calculation, then redo the calculation putting the currently correct 75/25% interest split in to their respective boxes, result is the same. to be fair if the "25%" box is left blank then some auto calculation could be going on, but if thats the case why make us manually calculate the split.

Also new this year is a £1000 property allowance, i think this is only useful if you have low costs, as you cant use this allowance as well as offsetting other costs, thats how i read it anyway, anyone know more on this?