Did you google it ? first search shows the diagram, did you remove the old wires without making note what terminal they came from ? No standard colours it depends on who fitted it.
No as before ask other tenant to look in handset there are NO common colour configurations take picture or write down colours to terminal letters. It can be sorted from that.
If you need to find a tradesperson to get your job done, please try our local search below,
or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Please select a service and enter a location to continue...
Are you a trade or supplier? You can create your listing free at DIYnot Local