I need a bike shop that will sell me something like the following. Preferably somewhere with helpful and knowledgable staff who can help me choose which model and which size. (I am deeply unimpressed by Station Cycles whose staff are so useless they couldn't sell me a bike when I was ready to drop 600 quid on one there and then.)

• child seat
• step-through frame
• panniers
• hub gears
• hub brakes
• hub dynamo
• chain case

ETA: Yes I know this descrbes a Dutch bike. Yes I can find out which shops stock them. What I want to know is which shops have staff that are helpful and knowledgable about this kind of bike - i.e. not fen mountain bikes and other BSOs.