1. What is the primary ground of appeal /MAIN REASON/  asserted by each appellant based on the European Convention on Human Rights?
2. In the case of Mr. Horncastle and Mr. Blackmore, what offense were they convicted of?
3. What transpired  /CAME TO LIGHT/ with the witness, Mr. Peter Rice, in their case?
4. How was Mr. Rice's witness statement admitted  /TO MAKE IT POSSIBLE TO TEST BY THE COURT/ into the trial proceedings?
5. What criminal charge did Mr. Marquis and Mr. Graham face?
6. What transpired with the witness, Hannah Miles, in their case?
7. How was Miss Miles' witness statement introduced as evidence/ADMITTED INTO EVIDENCE/ nce during the trial?
8. What is the principal issue at the core of these appeals?
9. What are the minimum rights guaranteed to individuals facing criminal charges under Article 6 of the European Convention on Human Rights?
10. What contention /ARGUMENT/ do the appellants raise /PRESENT/ regarding the admission/ADMISSIBILITY  of the witness statements?
11. Which Strasbourg case is invoked  /referred to, rely on/ by the appellants to bolster /to make st. stronger/ their argument?