Solo traveler 5 days in Interlaken/Lucern

Hello Serendipity, and welcome to the forum. You have great travel plans. The Interlaken and Lucerne regions are wonderful indeed. As for the weather: it's hard to say what it will be like in May. Over the past years, May has often turned out to be a nice and sunny month, but of course nothing can be predicted. I've had very different experiences with the weather in spring. It can even vary per region and per valley in Switzerland. A pre-planned excursion with fixed trips and dates could be disadvantageous if the weather isn't good, because you can't adapt your plans.

Speaking English isn't a problem in most cases. Especially in tourist centres such as Lucerne and Interlaken, many of the railway and catering industry personell will understand and speak enough English to help you out.

I don't have any experiences with guided tours in Switzerland myself. I'd prefer to plan my own trip and have a flexible schedule, which can be changed even at the last moment. But I understand why you're looking for tour operators, as they can offer relaxed holidays. There's been another topic on this: you could take a look at this if you'd like. Meier Tours, which is mentioned here, offers daily excursions around Interlaken and Lucerne. Swiss Travel Centre, which you've been looking at, is an official Swiss railway tour operator and they have a good reputation. Both programmes you mention look wonderful, but you have to see whether your biking and hiking plans fit in the schedule.

Should you choose one of the tours you mentioned, then a flight from the UK to Switzerland is part of the schedule. If not, you do have the option to make a train journey. This is a fine alternative, as it's rather quick and easy, with short check-in procedures. More explanation can be found on our page on rail traveling from London to Switzerland.