Getting songs out to artists is a challenge. Music business contacts - people actually active in the industry - are essential. Contacting artists’ lawyers is another way but most are unlikely to accept unsolicited submissions.

The OP (or any songwriter in the UK) could join The Ivors which holds events useful to writers: https://ivorsacademy.com/membership/

A way to get songs heard is via songwriting contests. Vocals need to be good enough to put a song over, but for those who feel their vocals aren’t up to it they could use a software voice such as Synthesizer V. There’s a whole thread on Synthesizer V at VI-Control: https://bit.ly/3JoLleT

Or pay someone on Fiverr to sing for them. https://bit.ly/3L6Ssd1

Here are some song contests worth considering, they’re generally international: https://bit.ly/3T26Q8f

Pt.1 of my biog: https://amzn.to/34tgVn1