MRCP (UK) Part 2

Part 2 preperation is a different ball game.
Here simply knowing stuff wont help you but you have to corelate it accordingly,  you must be good at data interpretation, identifying important signs and symptoms, fluent in Xray and ekg interpretation, though you are not required to posses high skills in radiology but RCP does need you to know about imp CT scans,MRIs, Dexa scans, angioplasty etc.
What study material you should Use:
Unfortunately we don't have many quality online subscriptions available and the most important online qbank is Pastest , in comparison to onexamination.com(another qbank) it has tougher questions and pastest resembles closely to real questions.
Onexam is simply not good enough for part 2 as it has way off the topic questions.

You also need to see goggle images for pictorial questions as there will be 40 to 50 pictorial qs in the part 2 exam and usually it includes 4-5 ekg, 5-6 xray, 3-4 ct scan,1-2 dexa scan,1-2 angiography; 5-6 dermatology slides, few rheumatology slides and so on.
This is not exactly for everyone but  this is the pattern asked in majority of question papers.

For ekg you should refer Hamptons's 150 ekg cases , its very good book and will take care of ekg section of mrcp .I have also found there are many online ekg libraries available and they have excellent collections.you may want ro refer them.
For radiology slide ,I would suggest ro read Radiopedia.com .it has vast collection of radio slides but all you need to see is important diseases such as Sarxoidosis, histoplasmosis, silicosis,asbestosis,tubercluosis, lung cancers; pan coast tumor,thymoma,inyerstitial pneumonia,ARDS,CHF,dilated cardiomyopathies, emphysema,pulmonary edema etc to name a few.

Last but not least is to get yourself familiar with route of administration of imp drugs such as during ACLS ,mode of ADRENALINE administration in case of no IV acess available, how do you inject adrenaline in anaphylaxis etc , its very common theme and often asked in exams.

You also need to know dosage of some important drugs such as digoxin, aldactone,lasix,amlodipine, azithromycin,augmentin , phenytoin ,etc.