Hi @datapiat,
You should be able to do this with the NeighborFinder, a ListSorter, and AttributeManager.
Since you have the eastings/northings in the Excel file, you can set the data type to x_coordiante and y_coordinate in the reader parameters, if you are unfamiliar with this be sure to check out this article.

Now that you have points created, you can use a NeighborFinder to calculate the distance to each point. To ensure this calculates the distance to each point, clear the value in the Number of Neighbors to Find parameter (by default this is set to 1) and select Generate List to include the Event attribute in the list that is created.
Next, use a ListSorter to sort the Candidates{}.Event list that was created by the NeighborFinder in alphabetical order.
Lastly, use an AttributeManager to remove unwanted attributes, convert the units to km, round the values to 2 decimal places, and set the order the attributes. You could do this using multiple transformers or all in the AttributeManager by using Math Functions to set the AttributeValue. For example, E1 could be set to:
@round(@div(@Value(Candidates{0}.distance),1000),2)
I have attached an example that might help.
NeighborFinder_Example.fmwt