What is represented by this BrainBat?

R
E
N
N
U
R

Four friends were discussing their prize winning carp. There were four different colours: red, green, blue and yellow.

No lady has had the same colour fish twice. The lady who currently has the green carp used to have a yellow one. Betty, who is not Mrs Longheart currently has the blue fish. Mrs Kipper who now has a yellow one, used to have a blue one. Neither Mrs Ada Fishtail nor Mrs Jester, have ever owned a yellow fish. Cybil is not Mrs Kipper. Diane and Ada have never shared the same colour fish.

Can you determine their full names and colours of the fish the ladies have previously had and currently have?

At the local BrainBashers Internet despatch centre, the packing department was getting ready for the weekend.

However, it was late in the day and the final five packages were ready to be labelled.

Unfortunately, Fred dropped the labels to the packages and then had no idea which label belonged to which packet.

What is the probability that Fred managed to correctly label exactly four of the five packages?

Can you find something which has keys that open no locks, with space but no room, and allows you to enter but not to go in?

What are the next five letters in this sequence:

HDSOAW
HDHAGF
ATKH
AATKM