Why did some British cold war era fighters have pylons for missiles on top of the wings, or in the electric lightings case fuel tanks?

[BiffF15]

I didn't realize the frames shipped with the tanks. Thanks for the correction.

Thanks too for the insights.

Here is the first known example of CFTs…

 

[SaparotRob]

Here is the first known example of CFTs…

Is that the Toppleover 144?