In reply to mutt:
What discipline are you aiming to do a PhD in, also do you have a subject/title in mind or are you hoping to pick something? Let us know what you’re hoping to look at,
PhD funding landscape has changed a lot. When I began as an academic, a grant application (say EPSRC) would include a costing for one or a number of PhDs. Now, funding is directly channeled by UKRI into a number of thematic Doctoral Training Centres which tend to live in top 40 institutions. A new tranche of funding has been announced, again mostly for this group of Unis. There is fierce competition to get a place in a DTC.
The other route is direct industrial/commercial PhD funding in a project. It helps to know academic/industry contacts to get in by this route.
There are a lot of self funded part time PhDs, but it is a grind and often difficult to remain focussed and connected. This route tends to have a higher drop out rate over the typically 7ish years. Of course if it’s lab based, the bench fees increase the cost.