to be continued ...
Jack; Thomas, Joshua; William; Daniel; Matthew; James; Joseph; Harry; Samuel
Top 10 girls names:
Emily; Chloe; Megan; Jessica; Emma; Sarah; Elizabeth; Sophie; Olivia; Lauren
Is the problem fully resolved?
Because London is a multicultural city, knowing the English names only doesn't help because you might meet people from other cultures as well. So I guess the best way is just to ask the other person to spell his/her name.
Here is another link to explain how to use telephone for people who stammer.
If you stammer sometimes like me, discipline yourself to practice this technique, desensitize yourself and boost your confidence.