Thank you so much for your replies.
Ogonek - I sent the ham last year, as part of a hamper, as they had just arrived back in the UK for the birth of DGS and would have had no food on arrival. I thought that they would be pleased, and that the DGC would like playing with the hamper afterwards and maybe keep their toys in it. DD1 had also told me her pjs were full of holes, so I wanted to buy her new ones, especially as she was going into hospital, although I wanted to anyway. I was genuinely so hurt at their reaction. I thought that the candles would make the house smell warm and 'Christmassy', especially if the house were a bit cold and damp. It seems I was wrong, although I assume that the cashmere items and silk pillow case were acceptable, as they weren't mentioned or acknowledged. But I did put thought into the gifts, as I did into this one.
I remember this whole rejection of presents strategy started some years ago, when I sent an advent calendar for DGD1 (rejected because it wasn't dairy free) and a jigsaw for LB, which I know he likes, but he 'didn't want it'. At that stage, I thought we were reconciled. DD1 kept asking me what to do with the jigsaw. I said I don't know, give it away, give it to a charity shop, even put it in the bin if you don't want to do any of the former. I agree with lamaze1 that the current attitude is rude - it certainly wasn't how she was brought up - and with MrsCat1 that gifts are used as a means of control. I can just imagine LB holding up my gifts to ridicule. He demeans DD1 by criticising her family and former friends and this is part of the methodology.
RandomMess - I haven't decided about Ireland yet and I haven't responded further. I don't want to exacerbate the situation.
SirVixofVixHall - I agree that the way forward is to stop buying gifts or just give token gifts. I remember when LB first met DD1 he did give her what, for him, must have been a generous amount of gifts for her birthday. Thereafter, she was told that they could only spend £5 on each other, although they were students then. I don't think he bothers at all now. He just tells her they don't need anything and, now that she doesn't have her own bank account, I imagine that she will have to beg for and justify everything, which really upsets me.
To be fair, she rarely asks for anything for herself - although I did buy her some good boots for being on the farm - but she wants her children to have nice things. She has been 'trained' to believe that she doesn't need anything that is not strictly necessary or in any way frivolous. She was so happy to go out for that meal with me when I last visited and get dressed up. I actually do think that she values me more since the loss of her DF and was very concerned when I had a recent cancer scare (fortunately all fine).
monsteramunch - I think that you are right in saying that DD1 had emotionally disconnected and, to an extent, I was sending gifts to try to win her love and approval, as you perceptively say 'a rope that connects' me with her again.
tribpot and Blanca87 - I haven't decided yet whether to go. If I don't go it will be more ammunition for LB, who will tell DD1 that her mother is useless, unreliable, a heathen, mentally unstable etc, and best not allowed to pollute the DGC etc. The whole trip has now become quite overwhelming, apart from the emotional aspects, with so much stuff which they have ordered to this address, as well as the gifts, that I feel like a pack mule.
NatalielsFreezing - I wouldn't comment on another person's religion and I don't expect them to comment on mine, as nobody knows what is in someone's heart and soul. But the concern is that it closes their minds and hearts rather than opening them and, of course, I am terrified that they accept the RC Church's position on contraception. FerretinAFrock (marvellous user name!) - I do worry that he will want more DC, but I suspect he will struggle with the he already has when they start to develop their own personalities and rebel. Interesting what you say about DGD2, who has apparently started wetting the bed again, which DD is concerned about (although she is not quite 3, so probably not a cause for concern at this stage).
Glindira - I haven't witnessed anything untoward in LB's treatment of the DGC, although DD1 does everything for them and their attachment s very much to her rather than to him. He was quite 'short' with the DGDs but nothing physical. he just seemed tense, but maybe that was because I was there. He did seem to be trying to make a bit of an effort to be nice to me last time, but we are never going to be relaxed in each other's company.
DD1 now seems terrified of life outside this remote rural area. She genuinely seems to believe that other places are seriously dangerous, particularly London, whereas she used to visit it quite regularly, loved going to the theatre, studied at the Cordon Bleu school (before she decided to go to university), would go with her friends etc. She asked me in our last conversation if I had heard about the stabbing in Hyde Park and said, just to think, she used to go there regularly. She doesn't understand why I still visit. LB had never visited London before he met DD and asked her if there were a festival on, as it was so busy! 🤣
LittlePearl, Dery, tribpot and others who have said that they are pleased that I had the conversation, perhaps, but also disappointing to have said hurtful things to her, at a time when the relationship was improving. I literally don't know what to say to her now. I feel paralysed, as I don't want to make the situation worse and she will be on tenterhooks, waiting for my reply, which LB will scrutinise and comment upon. He reads lots of information about personality types etc and likes to analyse everyone. He is clever, so DD believes him, and he uses his ''expertise' to put down other people, although I suspect that he has some inner insecurities, including the fact that his sister appears to be the preferred child.
startingline - I am so sorry to hear about your MIL There is only so much hurt a person can cope with. This is why I am wary of forming too much of an attachment to the DGC, until they are in a position to decide for themselves whether they want a relationship with me.