1. Aberdeen is graduate entry only i.e. you need a degree.
2. You can check the entry and subject requirements yourself for the English dental school by going on UCAS or checking each individual university website. Most of us will not be familiar with the Scottish entry requirements.
3. You need to do some work experience in a general NHS practice at a minimum and anything else is a bonus such as dental lab, private dentist, oral and maxfax, dental hospital, community dentistry, orthodontics (although Leeds will expect you to have some variety over a long-term).
4. It is also necessary to do some voluntary work in a caring environment for most schools e.g. care home, hospice etc.
5. It is useful to have some sort of example to demonstrate manual dexterity, however don't get too worked up on it, it's something they can teach you at dental school and most schools aren't too fussed about reading it in your PS.
6. You will also need to sit the UKCAT; Liverpool, Leeds, Birmingham and Bristol DO NOT ask for the UKCAT, the rest do. Sheffield, Newcastle, King's and Glasgow normally want scores of 650+.