They were heavily involved in the modern New Testament translation of 1881. They were believed for years to be upright Anglican clergymen.
Any web search for Westcott Hort will turn up a wealth of hair-raising information on these two heretic communists. Their work has influenced nearly all modern bible translations.
One of the reasons I’m partial to the New King James Version is that it uses the TR greek as the bases of the NT. Where the TR disagrees with the more modern greek NT, it mentions that in the reference notes. So the NKJV gives you the KJV feel and manuscript foundation in an easier to read Bible.
But just so you know, outside of the American Standard 1903 and possibly the Revised Standard (and the Jehovah Witness Bible NWT), Westcott and Hort is not used anymore. The most common greek is UBS i think revision 4 and NA revision 28. There is another method that uses a mix of manuscripts such as that used by the NIV.