1500 miles is not high mileage.
+1
Some guys do that per month (definitely not me though)
Personally I would split it and list it either on ebay individually or on Bikeradar or Road.C.C think thats your best option to get the best return.
You may find also that when trying to sell it as a complete bike on ebay its better to start at 99p (with a reserve if you want) ,your starting price of £900 will deter people from bidding when there’s lot of similar spec other bikes on for a lot less.
Start the bidding low and hopefully you may get several people who get caught in a bidding war , also list it so it finishes at a decent time anywhere between 7 and 9pm in the evenings is normally good, list it so it finishes at a daft time and chances are you will end up selling too cheap.