When the person against whom you are making the claim responds, the Court will send you a copy along with instructions on what you should do next. Alternatively, the court may fix a date when you will have to appear before a judge who will tell you what the next stages are.
Small claims hearings almost never last more than a day, but the court can deal with your claim without holding a hearing, an may simply consider the documents in the case. If this course of action is to be taken, the court will inform both partie. The court can also deal with the case by way of a telephone link, if you and the defending party both agree.
If your opponent does not send in the acknowledgement that the papers have been received, or notice of his defence, within a reasonable period (normally 21 days), you may well get a judgement in default, without the need for a hearing. This may also happen if the defendant admits all or part of the claim. If he does contest part of the claim, the court can make a judgement for that part of the claim that is admitted.
You do not necessarily have to attend a hearing at the Small Claims Procedure, providing you give the court and your oponent not less than 7 days notice that you will not be attending. In such circumstances, you can submit written documentation to the court, which will be taken into account when reaching a decision.
You can get a great deal of up-to-date information by going to the Government site giving advice on small claims courts.
N.B. You cannot get a judgement in default for delivery of goods that are subject to an agreement covered by the Consumer Credit Act 1974, although it is difficult to see how this could apply to any claim relating to travel agents or tour operators.