If the committee are recommending at this meeting that the contract be awarded for £50k, then they have missed a number of legal steps.
1. Contracts over £25000 are subject to the Public Contracts Regulations 2015 which include a requirement to advertise the contract on the governments Contracts Finder website and must involve a tendering process. Has this taken place?
2. To approve the awarding of the contract a specific resolution on the agenda is required to award the contract to a specified company for a specified price. You can't make a decision on something that is not clearly included on the agenda (Local Government Act 1972, Schedule 12)
It may well be that the report to the council from the committee is for information sharing only and to advise the council on the commencement of the tendering process and the above procedures. Also, do they have allocated budget for this work? If not, then they are going to have to start applying for grants and funding...
As for the newsletter, for £1000, that is cheap and within the powers of the parish council. Again, though, there should be a budget for this and if they are having to reallocate funds from another budget heading, there needs to be a resolution to that effect. But you might find that the terms of reference for that committee, allows for spending under £5000 to be kept within the committee and this may have already been done.
Overall, from what you have said, the council cannot make any decisions on either of these two items at the meeting. As for the s106 question, the tendering process for the £50k contract would still have to take place.
Hope this helps