The Uart I had found has now been tested in simulation to see if it can transmit at 115200 Baud. It looks like it can so the fixes I put in appear to have worked.

As the testbench connects the tx to the rx a loopback is formed.
On checking the data coming back it appears that the same value is received back.

It's looking like its the correct speed as well, a 4.67% error over the entire 10 bits. Also the count is reset again at the start of the transmission so it should be good.

This shows the result