As soon as someone can explain what "Gravity" is, in the first place! I do not mean its actions, laws or symptoms, I mean the fundamental mechanism.
Till then these stories are pretty much "What you see is what you get".
There are only two redeeming features of these Brit Trash papers:
1: Wrapping fish and chips.
2: Page 3.
So what is electromagnetics all about at the level of "fundamental mechanism? Exchange of photons, sure, but have you ever seen a photon? Well of course you have, but only in the millions and billions of them on the macro level. Einstein, of course thought that gravity is not a force at all in the conventional sense, like electromagnetics, the strong and weak nuclear forces, which are all particle exchanges, but rather a warping of space-time itself. Sort of hard to see how to shield a warp in space time, other than by creating a warp in another direction, that is use a bigger or closer mass to flatten out the original warp at least in the local vicinity.
Well, Einstein's general theory of relativity gives a pretty good explanation - as the curvature of spacetime caused by massive objects. Our travel through curved time (in particular), causes the effect we know as gravity. But of course, as with all things, there will be further underlying understandings.
There is nothing in physics about fundamental mechanisms. It's all imagination of what the universe is like and we will never know what the reality is.