*This add-on may or may not be of use with the latest updates as there were updates to the london area and orbx add-ons since it's release. I don't plan on updating this add-on as was only meant to be scenery enhancement.* 

Here is My River Thames water height fix and uncovering of hidden features under the water.
This add-on should have zero impact on your performance in the sim.

This works with default London scenery and if only using the EGLC airport add-on 

There is a separate file in the zip file for use with Orbx EGLC airport add-on, had to do this due to patches in the water around the runways, because objects were removed from the water in the EGLC add-on.

To add this file, just unzip the file into the community folder, then delete the file you don't need.

You will see the following files, delete the one you don't need: - thameswater for default&londoncitypack 

                                                                                                   - thameswater for Orbx EGLC add-on

if you have EGLC combined with either the default or London city pack you should add the "thameswater for orbx EGLC add-on" file to the community folder only and delete the other. Do not add both to the community folder or neither will show up in the sim.

If you don't have the EGLC airport add on, then add the file "thameswater for default&londoncitypack" to the community folder and delete the other. Do not add both to the community folder or neither will show up in the sim.

If you have other add-ons such as Orbx London city pack, If you find your Microsoft flight sim content.xml file open with notepad and re-order my fix under the Orbx London city pack you will get my fixes combined with Orbx buildings  looks ace. (I AM NOT TO BLAME IF YOU MESS UP YOUR content.xml file.)

If you wish to reward my efforts for this add-on any donations are much appreciated, I will never charge for my add-ons and hope they enhance your Microsoft Flight Simulator experience.