1.    Traditional unit of liquid, used for beer or milk. 

2.    Fish ....... chips.

3.    Member of the nobility.

4.    Famous ball game invented at an English school.

5.    Acronym of "I owe you".

6.    Same as 2 down.

8.    the Queen is head of state, but she has no ..........

9.    British flag (5,4) 

11.   The traditional drink of the Navy. 

14.   Ceremonial guard at the Tower of London.

15.   Britain has great reserves of this black rock.

17.   A tart upside down! 

19.   They come from Wales. 

20.  The Grand National and the Derby are both .......

21.   County.

25.   Travelling salesman (abbreviation). 

26.    Female sheep.