Half the solutions are to be entered in a 10 across manner. Ambiguities about some entries are resolved by the appearance of four names with something in common appearing in the completed grid.

Deadline for entries is 23:59 GMT on Saturday 30 July. You need to register once and then sign in to theguardian.com to enter our online competition for a £100 monthly prize.

Click here to register.

• The deadline for entering this month’s competition has now passed.