I would cut those thin stems off, to be honest - what you need to encourage are good, strong stems which grow upright, and at pruning time, part of the pruning routine is to remove thin, weak stems anyway, so in spring, they should have been removed, but you can do it now. Pop the stems in a vase and enjoy the flowers they've got instead.. Its repeat flowering, so you should get more blooms on the upper, stronger parts of growth.

Just out of interest - if its planted through membrane how do you feed it please?

That's a good question, Stera. I put down chicken manure pellets in Spring right at the part where the stem meets the ground as the hole in the membrane seems big enough. I will also water it with tomato food from time to time.

You're probably going to say that isn't sufficient! I'm happy to be given other instructions though.

I've cut off the weak stems, Bamboo, but too late to enjoy the blooms indoors. Thank you for the advice.

The foliage up top looks a little pale - assuming its getting enough light (note I didn't say sunlight, there's been not much of that about recently) give it a handful of proper rose food, something like Toprose. You've just time to do it before end of June...

Yes it is a little pale, B, but right now I only have chicken pellets and tomato food. I guess neither would do?

I had noticed it the leaves we’re pale but hadn’t got around to it, given the wet. Thanks for the reminder.

I'm not going to say it isn't enough - I'm no rose grower - only have three. But if it worries you it would be possible to slit the membrane and give you a bit more space to feed through?

I always think its worth using a proper rose food - its specially formulated with all the correct levels of nutrients for roses.

Thank you both for your advice I've taken it on board. The next step is to buy some rose food before the end of June.