That above quote from my earlier post was about a case where no debt actually existed. The reomval costs point is the same though; they can only charge reasonable expenses to cover the cost of actually removing goods.
In this case as rent was owed, if they actually levied distress (but did not remove the goods) they can make a charge of 12.5% on the first £100, 4% on the next £400, and 2.5% on the next £1500.
For rent, they cannot charge merely for attending to levy though.